Especially when chilly weather arrives, they tend to dress in fine wool clothes with classic lines. What I'm trying to say is that you'll blend in better in downtown Florence in slacks, dresses, sweaters, and jackets than sweat suits and similar apparel. Having said that I notice that clean, pressed jeans are becoming quasi acceptable wear across the age spectrum. Generally, Italians eat a light breakfast consisting of a caffe or cappuccino with a pastry early in the morning. This may be followed by a light snack halfway through the morning.
Lunch is the big meal.
At home or in restaurants it is served in courses one after the other with a change of plate for each course. Of course you are free to limit yourself to the primo or secondo and whatever else you want. In the countryside don't expect to find a gas station or a store open because there won't be. Chi mangia da solo si strozza. A tavola non si invecchia.