From left to right.
On a twin engined aircraft, engine one will be on the left wing, engine two on the right. On a four-engined aircraft, engines one and two will be on the left wing, with engine...
Every single self-propelled aircraft ever made. This is like asking "Which car has an engine?". Without an engine, you're going nowhere unless you've got a tow plane.
What happends is when the engine spins really fast they have these little blade like things in the engine and it spins really fast sending the aircraft into the air