Those questions will all be answered by that book.
I found this table stating some of the OT prophecies that are answered in the new testament:
Messianic Prophecies
I obviously don't have time to go through and read every piece of scripture in there but my guess is its accurate since scripture is listed directly.
My logic is more along the lines of this. Abraham Lincoln was assasinated by John Wilkes Booth, was I there to see it? No. Do I believe it to be true? Yes because there are numerous first hand writings to support that claim.
When Jesus walked the earth he preformed miracles in front of many who still would not call him the son of God. Was I there to see it? No. Do I believe it to be true? Yes because there are first hand writings of those who saw it. This book will explain why the gospels were chosen above other writings during that time and also explain why they are historically credible.
At that point you can make up your mind about Jesus. Liar, Lunatic, or Lord?