Florence has its own museum pass called Florence card. It covers nearly 70 museums including the big ones and many small ones where you just want to spend 10 minutes. However, at 72 Euros, Florence card is tad too expensive for the privileges.
Most visitors to Florence end up going to only two museums. It is recommended to buy the card only if the attractions you intend to visit add up to around 72 euros of entrance fees. Instead of Florence card, you should make reservations for the Accademia and Uffizi. If you plan to climb the dome, reach Florence cathedral early in the morning when the crowds are less.