should be pretty easy to do some of the stuff your self.
You should quite easily be able to do the front pads, coolant flush, and air con belt yourself. You'd be suprised how easy some of the stuff is, plus its a great way to get to know your car.
But with the pads, make sure you get quality pads - ie bendix or similar. They make a huge difference.
The pads might be around the $60 mark, coolant prolly $10-15 and the belt $5??
These are just guesses, but should be in the right ball park.