Cars: What makes them go? Part-1

I lack the fundamental basics when it comes to knowledge of cars, their engines, what makes them go. I put the key in the ignition, I turn it and if it doesn't work, I'll calmly get out and try the key in another car's ignition. Only joking. Basically, if it doesn't work, I'll shrug, get out, stick out my thumb and get a lift with someone who has a car who has a key that seemed to work that morning. Or something.

Now batteries exist not only in torches that you find in the boots of cars, but actually, I have since learnt, exist in engines as well and need to remain fully charged.

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