Travelers checks are probably the easiest form of currency. Major credit cards are accepted everywhere. If you like, you can. Keep in mind that you do not need to open an account to receive money from the U.S.Your bank in the States need only tell you at which bank you will be able to cash your money. It depends on what you want to do.
Habits vary enormously from student to student.
The staff helps you get medical assistance. No, the voltage in Italy is different, and we advise you not to buy transformers because generally they do not work properly, and you run the risk of blowing the fuse. It is better to buy hairdryers and other electric supplies in Florence. Comfortable warm clothes for the fall and winter and a nice outfit or two for special occasions. It may be very warm in September, pleasant in October, rather cold and rainy in November and December.