I am 17 and would like to buy a moped. I'm intrigued by them and vespas and two-wheeled vehicles in general. I know i sound like a retard, but i don't understand how moped work because they have pedals. Do you just pedal if you want it to be a bicycle or turn the motor on if you want it to be a motorcyle? how does the engine start? just any basic information would be greatly appreciated.