also shows a car with a lock on it symbol on the dash
wont start says lowfuel but has 3/4 tank then says power steering on 2005 Chevrolet Cobalt
The lock symbol is your entire problem. The car's antitheft system is activated for one of two reasons. The key's battery or microchip has failed and the ignition won't recognize the key and thinks someone is trying to steal the car and shut the fuel pump off. Try your other key if you have a spare. Second, the key ignition cylinder itself has failed and needs replaced. The issue is the antitheft system. Prob. going to need diagnostic if this doesn't work for you.
seek help on reading anti theft codes and post