wow, dayaa, you're not asking much.
you should be able to find the answers to much of this on
http://www.jewfaq.org which is a reliable and open-minded site. have a read there and then come back and ask some more specific questions.
re your question 3, this is a quite involved question which requires some knowledge of the various sects and denominations as well as different opinions on the nature of the soul. suffice it to say that it's complicated and advanced and by no means agreed upon by all.
b'shalom
bananabrain