To rent an ATV or a moped you need to have the rights of category A. You saw how the mopeds are rented and for category B rights, but that's not right, there will be problems with the police.

Rent costs approximately: ATV - 20 EUR per day, moped - 15 EUR per day.

In Greece, you will require a driver's license. At the cost of the answer like this: it all depends on the company offering the rental, about 30 - 40 EUR.