Other than plugs, coils, and the vcg? Pistons, Pistons rings, clogged injectors, fuel pump though not very likely as it would bog down the entire motor...
Im replacing one side of motors ignition this weekend sometime. Passenger side VCG, 4 coils from NAPA, and 4 new NGK platinum plugs.
Total was about $270 with free labor by myself and my uncle. I also get a discount on parts from NAPA as I have an uncle that works there, and one that manages the joint hehe.