Most classic ristoranti will expect you to order at least Antipasto and Secondo or Primo and Secondo courses. An appetizer course, sometimes accompanied by an aperitivo, such as a glass of prosecco, a sparkling white wine. Antipasti in Tuscany tend to be light, such as a few slices of bruschetta or crostini, which is bruschetta with a topping. The soup or pasta course. Don't think of it as your main meal.
Primi are usually starchy, perhaps a risotto or some gnocchi.
Portion sizes may be smaller than you expect for pasta, but that's because you're nowhere near being finished. The main dish, usually meat or fish, almost always accompanied by a contorno, or vegetable side dish, that is usually ordered separately. Italians like something to accompany the end of the bottle of wine. There might be fruit and some fresh walnuts, or perhaps a ricotta tart. Dining in Italy Go with the flow in Italy's restaurants and feel free to ask the waiters for help.