There are no new alternators for this car. You can buy a rebuilt one but many have problems. First, take a look at the voltage on the battery. You need about 12.5-12.6V in order to crank.

If one or more glow plugs are bad, the engine should still crank but not be able to develop enough compression to start. The same thing for fuel-related issues unless you are totally out of fuel or there is something massive blocking a supply line.

As others have said, if there is oil on the dipstick, the engine wasn't run completely dry by only 2 quarts. When you get the engine running again, you may find you have overfilled it.

Dkr.