There are also a lot of articles for those new to backpacking or those who want to lighten their loads on the home page of this site. Look in the left-hand column. The gear lists there helped me cut my total pack weight by more than half without any sacrifice of comfort or safety.

Renting or borrowing, as suggested, is an excellent way to start. I also recommend the Mark Verber website for more detailed information about the types of gear that are out there.