Mac Forums

Hi. I'm a fairly new Mac user. I've used it a ton before and am pretty comfortable with it, but when it has problems I have no idea how to fix them. I recently got a refurb'ed iBook (really old, i know) and on Facebook, my chat won't work. Also, I cannot go directly to people's pages through the search box (I have to double click and then find them on a list). I cannot post on people's walls, update my status, or check my inbox. Does anybody know how I can fix this?

Thanks for any help I can get.