Replacing the guages is not a problem since the speedo works. You can buy another set of used guages and put your speedo/odo into it so that your miles are correct. As for as not starting, the fuel relay under the dash is usually the reason for it not getting fuel. Turn the key to the on position and listen to see if you hear a whine or buzzing sound for about a second in the gas tank. if not, replace fuel relay, if you hear it, I would say to check the computer and the distributor.