Travelling by bus in Italy
Regional buses: Trains don't go everywhere, and even if they do, sometimes the regional bus service is better - more direct and cheaper (eg between Florence and Siena). Timetables and tickets are available at the bus stations (usually next to the town's railway station) or on the buses themselves. A very useful website is: www.ibus.it.
City buses: City buses are always cheap, around a euro, and are usually valid for 75 minutes travel on other buses and often the underground. Travel on the buses can require a little planning as the tickets must be bought before getting on the bus and can bought in newsagents and tobacconists. Like rail tickets they must be stamped once on board. The mchines are usually up the back and you'll have to fight your way through no matter how crowded as you will be fined for travelling without a ticket or with an unstamped ticket.