XR250 Suspension setup

I have a 2001 XR 250, and supsension upgrades are the next thing on my list. Right now, it's all stock. What spring rates should i use for the forks, and shock? im approx 150 lbs w/out gear, my riding ability would probably fall between beginner and intermediat. I ride mostly trails, with occasional small jumps. I'm mostly concerned with the forks, because they're really soft, and bottom some times, but while im doing suspension work, i want to go ahead and do the back at the same time. Also, what fork oil should i use, and what level do i fill it up to?

Are there any special tools required to change out a fork spring? i would like to do the work myself, if it wouldnt cost too much in special tools.

Any help appreciated,
Michael