Before you start spending money, do you know what the problem is? Get somebody to turn it over while you check under the hood for spark. Don't buy a new coil if you have good spark. If you don't have any spark, use a test light (or multimeter) to see if there is good power supply to the coil/distributor unit. If there is a electricity going into the coil (the little wires), but not coming out (the "spark plug" wire), that is your problem.
If you do have good spark, go to Autozone for a "loan a tool" fuel pressure gauge and a compression gauge. Check these next. A good fuel pump should give a very minimum 30-35 psi to the fuel rail. I wouldn't be surprised to see 45psi.
When you check the compression, look for two things. First you want minimum pressure required for combustion. Most cars are in the 125-145 range, depending on compression ratio. Second, you want to see compression of each cylinder to be pretty consistent across the four cylinders. Generally, 7-10psi between the highest and lowest cylinder pressure reading is a sign of a healthy engine (mechanically).