91 cadillac sedan deville

i going to buy a 91 sedan deville but it has a little problem i think it got a new front end and a new steering collum but it will not start with the key the key has the chip and dont know if the new one is matchin up so they put a remote start but it only starts now if u put gas in the carb or what ever what can be the problem and is it worth buying?:uhoh:

From here there is no way to know what is what, does it have fuel pressure to the injectors, do they pulse, does the security lite stay on?