1) John 8:24 I told you that you would die in your sins; if you do not believe that I am the one I claim to be, you will indeed die in your sins."
John 8:58 "I tell you the truth," Jesus answered, "before Abraham was born, I am!"
Matthew 24:24 For false Christs and false prophets will appear and perform great signs and miracles to deceive even the elect—if that were possible.
2) I'm not aware of any regarding salvation
Galatians 3:10-13 All who rely on observing the law are under a curse, for it is written: "Cursed is everyone who does not continue to do everything written in the Book of the Law." (11) Clearly no one is justified before God by the law, because, "The righteous will live by faith." (12) The law is not based on faith; on the contrary, "The man who does these things will live by them." (13) Christ redeemed us from the curse of the law by becoming a curse for us, for it is written: "Cursed is everyone who is hung on a tree."
Galatians 1:6-8 I am astonished that you are so quickly deserting the one who called you by the grace of Christ and are turning to a different gospel— (7) which is really no gospel at all. Evidently some people are throwing you into confusion and are trying to pervert the gospel of Christ. (8) But even if we or an angel from heaven should preach a gospel other than the one we preached to you, let him be eternally condemned!
Ephesians 2:4-5 But because of his great love for us, God, who is rich in mercy, (5) made us alive with Christ even when we were dead in transgressions—it is by grace you have been saved.
Ephesians 2:8-9 For it is by grace you have been saved, through faith—and this not from yourselves, it is the gift of God— (9) not by works, so that no one can boast.
Titus 3:5 he saved us, not because of righteous things we had done, but because of his mercy. He saved us through the washing of rebirth and renewal by the Holy Spirit,
4) I don't know of any regarding salvation.
5) I don't know any.
6) I don't know any
7) I don't know any. Rather:
Romans 14:5 One man considers one day more sacred than another; another man considers every day alike. Each one should be fully convinced in his own mind.
Romans 14:6 He who regards one day as special, does so to the Lord. He who eats meat, eats to the Lord, for he gives thanks to God; and he who abstains, does so to the Lord and gives thanks to God.
So, to answer. The bare minimum:
1. Believe that Jesus is who He claims to be.
2. Ask for and fully rely on the cross for the forgiveness of our sins.