Hi Worcswuss
I don't think anyone has replied to this yet, so I'll have a go. Not claiming to be a theologian!
1. I think its fair to say that Christians believe the bible is god's word for us. It is made up of different books and its important to understand the origin and context of each of these. For example we are told the ten commandments were written on stone by God himself, then there were the prophets (humans who spoke from God), then there are the the gospels which are witness statements from those who knew jesus (lots of direct quotes) and then there are what are known as pastoral letters like those written by Paul which were to specific churches addressing specific (but remarkably familiar) issues.
The actual books included in what we now have as the bible are there as a result of agreement between scholars over the last couple of thousand years. Basic principles for inclusion as I understand it was agreement between multiple copies and compatibility with the rest of scripture. Its worth noting that people may disagree on interpretations of scripture. This is were theology comes in with regards to understanding the context - is it poetry, legal, narrative, a letter etc. Understanding who the recipient is and their culture is also important.
Jesus talked about his Holy Spirit who would also help us understand scripture.
So if you lived in a rainforest somewhere and had never seen a bible could you know God? I believe the answer is yes because creation itself proclaims God. I know lots of people will disagree with me - thats ok. For me being in the mountains, on the water in a canoe or kayak or in the woods is a spiritual experience.
2. Did Jesus claim to be the son of God? Answer to this one is yes. Its why he was killed. When Jesus was baptised by John the baptist the bible tells us a voice from heaven was heard to say"you are my son whom I love, with you I am well pleased". The old testament is full of prophesies for the coming of Jesus - thats one of the differences from the likes of David Ike. As for why people believed - I guess that is quite an individual response. What I do believe is that if God is real that he hears and responds to people talking to him (prayer).
This is a longer reply than I expected. I promise you I try not to look down on anyone.
Graeme
PS I don't think it is an accident that Jesus was a carpenter!