Actually, Scripture does contain all we need for salvation.
John 20:30-31 30 Now Jesus did many other signs in the presence of the disciples, which are not written in this book; 31 but these are written so that you may believe that Jesus is the Christ, the Son of God, and that by believing you may have life in his name.
Actually, all we need to know to believe is what's written in John's gospel.
But is it the complete record of everything in Jesus' life? Your post clearly states otherwise.
Actually, Scripture does contain all we need for salvation.Here you go then:
Jesus said to them again, Peace be with you. As the Father has sent me, even so I send you. And when he had said this, he breathed on them, and said to them, Receive the Holy Spirit. If you forgive the sins of any, they are forgiven; if you retain the sins of any, they are retained.
Not aure what you means by that.