Rent a car for travel in the countryside, walk or take a taxi in cities. You must be 21 to rent an economy or subcompact car, and most rental companies make those under 23 pay by credit card. If you want a bigger car you might have to show two credit cards.
The expressways are free, but the highways are toll. Upon entering a toll highway you are issued a ticket which you return while paying at the exit of the highway.
Uscita means EXIT in Italian.