He's telling you that you need to check those 3 aspects. Troubleshooting an engine can be broken down to 2 basic requirements, fuel and fire (i.e. spark.) A 3rd if you include air, but usually that won't completely stop your engine from running. If you're somewhat inclined, you can check your spark plugs. If you're not sure how to proceed, it's best you take it to the shop.
To be honest, from your initial post, I'm guessing that you need to take it to the shop.