'89 Oldsmobile won't start?

My brother's pile of a car won't start. It's been sitting idle for a few months now, until today when I jump started it. It turned over fine, so I let it set a few minutes, with the intention of letting it set for about 15min. I was going to move the car from the spot it's been in and as soon as I put my foot on the break, it died again. I tried jumping it a second time with no success. It won't even try to start. Any suggestions on how I can get this going again?

I don't have any experience fixing cars, but basically I'm trying to get it going that way I can drive it to a garage here in town.

Any help is greatly appreciated.