How do you drive a moped?

Only if it is over 50 cc.

Depends on the country

It doesn't really matter as long as the moped has headlamps, tail lights, break lights, turn signals, mirrors, and license plates. Check with your local law enforcement to see if i missed anything.

It depends what state you live in. Most younger teenagers can drive a 50cc or smaller moped after taking a safety class. If you want any more ccs, you need a motrocycle liscence, wich requires you to...

You can drive a moped at the age of 14.