You did not mention if it is a 4-cyl engine, which has a chain, or a V-6, which has a belt. The belt should be changed every 90k miles OR 6 years, whichever comes first!. The chain itself does not need to be changed. As far as an online maintenance manual, check out this site:
http://www.alldatadiy.com/
Also, this site has EXCELLENT information for you to use, probably more than you need or wanted to know LOL
http://www.toyotanation.com/forum/sh...d.php?t=224782
Good luck, my friend!
www.samarins.com