It sounds as if you've blown the engine, check the engine oil to see if it's full, if OK put a large socket on the crankshaft pulley bolt and try to turn the engine if it doesn't turn the engine is gone. I hope this helps. Take care.
The service and repair manual with diagram will provide you step by step help to locate and fix the problem easily and you will get the manual from the given link https://toolsnyou.com
Sounds like a spark plug or ignition coil that fits over the spark plug. When were they replaced last? Once removing the spark plug, while you're in there replace the ignition coils too. It sounds like only one coil is acting up but I'd replace them all. Go online and search for the best deals. Approx. $35 each.