With the Ten-T you just hit "start" on the remote. That turns on the car's own electric motor, powered by a 7.4-volt lithium-polymer battery. The motor turns a starter shaft behind the engine, which spins the crankshaft until the engine's suction draws in fuel. Meanwhile, the battery also lights a glow plug, similar to a spark plug, in the engine. The plug's hot element, combined with the compression of the fuel-air mixture when the piston rises, ignites the fuel. Then the plug keeps glowing, and the fuel keeps burning, until you're ready to call it quits.
Article Link and Manufacturer Link | Photo (unrelated) via flickr user SteelCityHobbies used under Creative Commons license