Here you can find all of Florence must sees:-) Uffizi, Palazzo Vecchio, the Duomo and the Cupola del Brunelleschi and many others…
For a drive in the countryside starting from Florence, I recommend the Chianti wine area and its scenic countryside and the fascinating San Gimignano, still in the Chianti region but on its western side.
Cars in Florence can be rented right near Santa Maria Novella train station. Check here for fares and the exact place where to pick your car up in Florence.
I remain at your disposal,
Enjoy your stay,