We must choose to become a child of the Holy Spirit (God).

Salvation is no doubt a gift. However, when you choose to become born again and live forever by the Spirit as the "saved" when your mortal body dies, "you are not your own" to do as you want as you did before, hence the cost.  

• What? know ye not that your body is the temple of the Holy Ghost which is in you, which ye have of God, and ye are not your own? For ye are bought with a price: therefore glorify God in your body, and in your spirit, which are God's. 1 Corinthians 6:19-20.

For example, nobody professing to be a "LGBTQ whatever" is born again. The concept is impossible because the alphabet culture is of the flesh and the born again are of the Spirit. You cannot live for the flesh and the Spirit, and nobody who is born again ever seeks to justify their own flesh.

The world justifies the flesh and its sin.

• ...know ye not that the friendship of the world is enmity with God? whosoever therefore will be a friend of the world is the enemy of God. James 4:4.

Please note that God said trying to do both, i.e., living born again as a friend of the world in the pursuits of the flesh doesn't work.

• So then because thou art lukewarm, and neither cold nor hot, I will spue thee out of my mouth. Revelation 3:16.

No. There is no such thing as a sin that does not require repentance, and the concept doesn't even make sense. God hates ALL sins and loves all sinners. He sent Jesus as the atonement for ALL sins of the believers in Jesus-the Word. The Father didn't leave any sins out of His promise of forgiveness unto salvation.

• Be not deceived; God is not mocked: for whatsoever a man soweth, that shall he also reap. For he that soweth to his flesh shall of the flesh reap corruption; but he that soweth to the Spirit shall of the Spirit reap life everlasting. Galatians 6:7-8.

The Father sent Jesus to die for all sins and for everyone who believes Jesus is the savior of the world according to the Word. The Father wants everybody to be saved by His son, Jesus the Christ. 

By way of reproof using common sense, why would God the Father allow some sins to be "blessed away" by a sinful man acting as God, or even referring to man as such? He wouldn't! 

As a Father, He seeks a personal relationship with each of us. Hence, the name "Father" is reserved for God the Father, and ONLY God the Father. As part of the new covenant we are under now, the pope and priests should not be called Father, and no Jew other than Jesus should be called Rabbi.

• But be not ye called Rabbi: for one is your Master, even Christ; and all ye are brethren. And call no man your father upon the earth: for one is your Father, which is in heaven. Matthew 23:8-9.

Therefore, why do the Catholics and other religions call their priests "father" when Jesus specifically said not to do that? Similarly, why do people call some Jewish religious leaders "Rabbi" when Jesus specifically said not do to that?

Please note: Having sinful men bless away sins is not only stupid but a murderous doctrine of the middleman religions. Be not deceived, God the Father has reserved His wrath and a lake of fire for the enemy, sin, death, and the unrepentant. Addressing whether or not some sins are worse than others, Jesus said of the "little white lies" many religions like to excuse or bless away by a robed seminarian supplanting God:

• I tell you, Nay: but, except ye repent, ye shall all likewise perish. Luke 13:3 and 5.

Yes.

We know:

• Jesus is the Word of God.
• Jesus said eternal life is available for us through belief in Him-the Word.
• Jesus proved eternal life is real and available through believing in the Word, in Him.
• The Word speaks of a "second death" in a lake of fire (hell) for the unsaved (verses below). 

Why test what He said about a second death in hell by wagering your eternal soul when eternal life is easily available? It just doesn't make sense.

• He that hath an ear, let him hear what the Spirit saith unto the churches; He that overcometh shall not be hurt of the second death. Revelation 2:1.
• Blessed and holy is he that hath part in the first resurrection: on such the second death hath no power, but they shall be priests of God and of Christ, and shall reign with him a thousand years. Revelation 20:6.
• And death and hell were cast into the lake of fire. This is the second death.  Revelation 20:14.
• But the fearful, and unbelieving, and the abominable, and murderers, and  whoremongers, and sorcerers, and idolaters, and all liars, shall have their part in the lake which burneth with fire and brimstone: which is the second death. Revelation 21:8.

More on this topic here as it affects the "church", the body of Christ.

No. There can be no faith in something that has already happened because it is a fact. Whatever happens, are facts to be believed.

For example, the death of Jesus on the cross and His resurrection unto life thereafter are well-documented events of human history! In fact, most of the original disciples, more than five hundred (500) miscellaneous people who knew Jesus, and Paul (the guy who authored almost 2/3 of the New Testament) all saw Him alive days after His lifeless body was taken off the cross He was nailed to and buried in a tomb. 

• For I delivered unto you first of all that which I also received, how that Christ died for our sins according to the scriptures; And that he was buried, and that he rose again the third day according to the scriptures: And that he was seen of Cephas, then of the twelve: After that, he was seen of above five hundred brethren at once; of whom the greater part remain unto this present, but some are fallen asleep. After that, he was seen of James; then of all the apostles. And last of all he was seen of me also, as of one born out of due time. 1 Corinthians 15:3-8.  

The events of Jesus' death and resurrection are facts to be believed.

When we believe the facts about the crucifixion and resurrection of Jesus and the promise of salvation Jesus gave us, we have the “power to become” God's sons (children) by adoption through faith in the Father's Word. Faith is belief put into action, i.e., conduct (action) in reliance on the belief. Confessing (admitting) sin and repentance from sin are the actions (conduct) of faith needed to be born again and saved when our body dies. Confession and repentance are required to be born again of the Spirit (saved).

Yes. Remember, we are made in the image and likeness of God. He is eternal and so are we even though we have this natural body on earth. After we die our body goes through a transformation into a spiritual body that does not age as it does on earth. When our body dies and is "buried":

• It is sown a natural body; it is raised a spiritual body. There is a natural body, and there is a spiritual body. 1 Corinthians 15:44.

The key is what is our final destination? What is that place where we as a whole, soul, spirit (truth), and body exists eternally after our body dies? There are only two options. (Hint: Choose option 1, eternal life.)

1. Everyone born again will be saved and lived in heaven with Jesus and the Father.
2. Everyone who is not born again will not be saved. They are the lost and shall burn in hell as an eternal second death.

Becoming "born again" means you are born of the Spirit of God. The rebirth exists in your natural body before your body dies on this earth. It is a time when the Holy Ghost personally teaches you all things and reminds you of what Jesus, the Word, said. When the natural body of those who are born again dies, the Spirit of Truth (Holy Ghost) in them takes them home to the opulence (splendor) of heaven.

Those who are not born again, have no ticket to heaven. They shall enter hell and be burned forever in a never-ending second death with the enemy.

• And fear not them which kill the body, but are not able to kill the soul: but rather fear him which is able to destroy both soul and body in hell. Matthew 10:28.

• What if God, willing to shew his wrath, and to make his power known, endured with much longsuffering the vessels of wrath fitted to destruction: Romans 9:22.

The moment the body of our flesh dies, the souls of whoever chose to be born again shall be given a glorified body and be taken up to heaven and live forever in paradise with Him, Jesus is-the Word.

By contrast, the souls of whoever are NOT born again, remain unregenerate unto eternal death and their body and soul shall suffer the torments of hell where God's wrath burns His enemies forever, the opposite of paradise. 

• And fear not them which kill the body, but are not able to kill the soul: but rather fear him which is able to destroy both soul and body in hell. Matthew 10:28.

There is no third option, but remember:

• For all have sinned, and come short of the glory of God; Being justified freely by his grace through the redemption that is in Christ Jesus: Whom God hath set forth to be a propitiation through faith in his blood, to declare his righteousness for the remission of sins that are past, through the forbearance of God; To declare, I say, at this time his righteousness: that he might be just, and the justifier of him which believeth in Jesus. Romans 3:23-26.

We, the born again, say it like this:

• For we ourselves also were sometimes foolish, disobedient, deceived, serving divers lusts and pleasures, living in malice and envy, hateful, and hating one another. But after that the kindness and love of God our Saviour toward man appeared, Not by works of righteousness which we have done, but according to his mercy he saved us, by the washing of regeneration, and renewing of the Holy Ghost; Which he shed on us abundantly through Jesus Christ our Saviour; That being justified by his grace, we should be made heirs according to the hope of eternal life. Titus 3:3-7.