Here's what to do for a quick fix:
Drain all coolant and fush GOOD till nothing but clear water come out.
Go to a pharmacy and get a quart of sodium silicate, you can get it online also. This is the same stuff as the "clunker bomb" so a local dealership may have some in stock you can get really cheap or free. Some consider this a "permanant" repair, other don't, however; I've seen and heard of this stuff working for YEARS without having to change out the gasket.
What it will fix:
Water/steam comming out of the exhast, compression blowing into colling system and out of radiator cap.
What it WON'T fix:
Gasket blow between cylinders, oil in coolant.
Best way to figure what to do or not is pull the tank cap off or the fill plug, make sure engine is full of water when cold(I'd pull t-stat to allow for easier fill). Crank car and rev. If water shoots out like a geyser(sic?) or the motor runs real hot withing a few mintures, use the juice. If not, it won't help.
Sit on the car for now if you don't feel like messing with it. It's too cheap and easy to fix. A head gasket is around $12. like boxfull said, $100 or less and a day's time and you're good to go. Don't let the economy take your car.
Sounds like it's not a matter of you can't afford to fix it; YOU CAN'T AFFORD NOT TO !!!!
Spend $100 and make another $1000 AT LEAST !!!!
Pull it down, have it checked for warpage and a quick visual for cracks (I wouldn't have the valves taken out as I don't believe these engines are known for cracks in the ports but someone here will know for sure, no need for an "extra" valve job), mill if nessisary and put it back together. You wouldn't have done a valve job before so don't do one now. if it ran good, leave everything else alone.
.......if I told you I'd give you a $1000 for a day of your time, would you do it ?!?!?!?!?
I know you're bummed out and this is just "another" of many things comming at you unexpectedly. DON'T GIVE UP !!!! YOU CAN HANDLE THIS !!!!