Theres a leak sealer, Stop Leak I think, that you can add to your radiator that will stop the leaks if they are small. I'd change the radiator if that was what leaked though.
Another problem could be the water pump. Take off the radiator cap and see if the water is flowing by when you look down into the radiator. If the water isn't moving then your water pump is shot and must be relpaced.
Mine did pretty much the same thing. Timing belt broke. Needed new belt, belt tensioner, water pump, etc. Roughly $1000. Luckily, my Subaru has a noninterference engine, meaning, if the timinig belt breaks, the valves don't slap together and completely wreck your engine. If yours is an interference engine, and if the timing belt broke, you might want to save up for a new car soon, or at least to shell out a few G's for a new engine
