Well, they charge all of us an arm and a leg, but that's part of car ownership. It sounds natural that your lights would come on for a short time after starting. Once running, it does sound like a fuel pump or fuel FILTER to me. It's a '93. How long do you expect it to run, especially when it's clear you do no preventative maintenance. I didn't know Buick's came with coils, but any experience I've had with coil problems, I don't think that car would move AT ALL. Had one let go in a snowmachine, and a Mazda RX7. Niether moved. Check your filter. If that doesn't work, you've just got to take it to a mechanic. Tell them the situation and perhaps they'll slap the computer onto it for $20.00 or so. What ever, I think it's time to dump it. Sorry.
Good Luck
Good Luck