You can download opening hours and ticket prices from the provided form at the bottom of each page on the section Art and Museums, by selecting the ones that interest you.
All state-run museums are closed on Mondays, but at the following link you can download a list of all museums open on Mondays.

The reservation of State Museums can be done either online (see the official Web site of the Polo Museale Fiorentino) or by calling (+39) 055294883 (Florence museums)

The original is kept at the Galleria dell’Accademia, while copies are located in Piazza della Signoria and Piazzale Michelangelo.

Information on this page.