To why isn't my car not working??

Need more information. Does it crank over? If it does do you have spark at the plugs? If you have spark, then how good is the compression? How good is the fuel pressure and flow? Any trouble codes?

Try spraying a little starting fluid down the throttle body. It should run a few seconds on that. If it does you have a fuel problem such a the fuel pump, for example. If it doesn't run at all on the starting fluid you either have an ignition (no spark) problem or no compression. Check for spark. If you have spark and fuel (the starting fluid) but it still won't run at all you need to do a compression test. If all cylinders test very low or zero it's jumped timing, if you have a timing chain or if you have a timing belt the belt is broken. If that's the case you need to find out if you have an interference engine. If you do, junk it. The engine is ruined and not worth fixing. Jim