What tag said with regards to taking it to a qualified shop if you don't know what your doing. At minimum have a 'good' friend who 'knows' what they're doing help you troubleshoot and repair them. This is not the kind of job you want to get web advice on unless you have a simple & specific question.

What's wrong isn't specific enough. <img src="/forums/images/graemlins/smile.gif" alt="" /> <img src="/forums/images/graemlins/wink.gif" alt="" />

Seriously be careful deciding if you repair this yourself or have someone do it for you.

Now that said, if you're just getting informed insights so you won't go into a shop blind, have at it. <img src="/forums/images/graemlins/kewl.gif" alt="" />

Oh, I would check for tell tale signs of leakage (bubbling up paint (it will eat your cars paint)). Some common areas of failure are the rubber line at the diff in back, and at each front wheel; the reservoir cap rubber gasket; the master cylinder, the front caliper pistons, the rear brake pistons, etc.

It's simple to fix, once you know what you're doing or have someone who does look over your shoulder as you repair it.