2002 Saturn L300 Car cranks sporadically

When I try to crank, the gas light, service light, check engine, it all comes on, dash lights up like a christmas tree, but then all disappear but gas light, service light and it wont actually crank up. Gas needle wont register there is gas in the car. I have replaced the mass air flow sensor and thought that was the trick but I let it sit for a few minutes, tried to crank it and got the gas light, gas needle didnt budge and service light came on. And yes, there is gas in it. Ive been told several different things by trani guy, cause when it finally did crank, it would shift really hard, said trani was shot, then told that the rear motor mount was broken, and that was reason for hard shift, but no answer why gas light, needle not working and service light comin on. I could spend thousands before its actually fixed. Any clues?