OK, so works are required then...
No, a sincere belief in the righteousness of Jesus teaching. A turning away from the sin of the world. Works will be a consequence of salvation not a catalyst.
No. What is required is the new birth from above that changes the heart. The indwelling Holy Spirit sealing us. This is a gift from God to all who believe. Nothing we can do to deserve or merit it. Knowledge does not save, belief does. Thee is a difference
Once you are in God's Family, he is the parent whether you are an obedient child, an unruly child, or a rebellious child. To be in the new birth reality, God has imputed the righteousness of Christ to you and sealed your once dead spirit with the Life flowing from the Holy Spirit. It is that Life flowing from the Holy Spirit that Adam forfeited in Eden. And thus death passed to all men. BUT God has provided His way whereby all who call upon the Lord believing He is and IS a rewarder of those who diligently seek Him are born into His Family.
If this seems a hard saying, know that believe / believing on Him is an action word in the Greek, meaning an ongoing exercise of belief, or 'faithing' if you will. Once saved by HIS new birthing of your once dead spirit, He is the parent, the author and finisher of your faith, your faithing.