I know that some areas of Tuscany are more difficult to get to by bus or train and more easily reached by car. I intend to stay just outside of Florence (to travel to the western and northern towns I want to see) and then later in my 15 days in Tuscany, I will be staying in or around Siena (to see the towns east and south of Siena). So, can I rent a car for a day to go to certain towns and return it at at the end of the day and can I take a bus for the same purpose and return at the end of the day on a return bus to my accommodations? The same would be true of taking a train. I do not know if it is possible to rent a car just for one day and then get up the next day and rent a car again for that day. Thank you for your advice.