Big topic, many questions, well hopefully this is a start for you. 

External evidence: Evidence from outside Biblical sources supporting the Bible

Internal Evidence: Internal signs of consistency which are complex and reinforce the integrity of the authors

Textual Criticism: Investigation the reliability of the transmission of the Bible

Oral Tradition: Investigating the gap from the resurrection the the written Bible

Inspiration: How God worked with the New Testament writers to give us the correct message

The Canon: Understanding how the 27 books were assembled

Early Church Councils: The early church meetings and what they really discussed

Gospels Background: Investigating Gospel additional details

New Testament books: Each New Testament book and the case for their reliability

Rejected Books: The books that never made it into the Bible and why