Check Engine Light Flash Code Translation

I have a 1995 Eclipse 2.0 Non-turbo. The car sat for about a year and a half. Way back then the car stalled and would not restart. I have since replaced a seized alternator. I'm getting spark and can smell gas on the plugs but the engine won't fire. The check engine light flash code is 12455. Does anyone know what this code translates to? Is this more than one code? Also the car won't crank with the key but it will crank if I jump it at the starter. Anyone have any ideas?