What is wrong with my car?

I have a 93 pontiac sunbird. Hehe...It's old. It is NOT well maintained. But it is relatively low mileage (84k) for it's age.

Lots of little things are wrong, but most notably I'm concerned about the engine. The temperature gauge recently (past 6 months?) has risen higher and higher and higher...it now goes beyond the RED zone (red is marked as 260, the bottom of the scale is 100) on EVERY short trip to work(10 miles?). Slowly rising up to that point. it passes out of the red probably after about 3-4 miles. The really odd thing, is nothing seems to be hot. I set the environmental controls to hot air and it comes out COLD. I feel the hood (not the engine) and it never feels even warm. However I very recently (2-3 weeks) have started to smell the burning oil more and more. And Today....the check engine light came on at the end of my commute in. It didn't come on for the trip home though.

A guy at Jiffy lube had mentioned something about a...oil....pump..pressure...something? I forget what it was, I hadn't heard of the part before.

So what is wrong with my car? (and how much to fix?)