1993 Chevy Lumnia w/151,000 miles

Ok I have spent that last few days looking over stuff and the net on this site and others and I am stumped. Maybe you can help? My wife's lumina quit the outer day like it was out of gas but the gage said 1/4 tank so I thought that maybe the gage had gotten stuck or something so I put about five gallons of gas in and it still wouldn't start. Then I changed the fuel filter and that helped a little the car will now start and idle but as soon as you give it the gas or put it in gear it dies. I got down by the fuel tank and listened for the pump to run and I can hear it humming for a few seconds when the key is first turned and according to what everyone has told me that means that it is working "they either work or they don't" I guess that makes sense. Now I'm stuck I don't know what to turn to next, and the worst thing is that I have a vary short fuse when it comes to any thing electrical ( witch I have been told has to be the problem) especially when I don't know were to start. Help please.
Thanks
Dave