Pisa/Lucca and checked into our hotel in La spezia in time to take a quick train to Riomaggiore for

I am traveling through Italy in July. My stops are Venice, Riomaggiore, Lucca/Pisa, SanGimignano, Montepulciano, Cortona, Greve, Florence and Venice. Should I rent the car for the whole trip? (Most of my hotels have parking) Or at what point should I get the train. Evaluating economics as well.
Unless you expect to take several day trips from Florence, the most sensible plan would be to rent the car at the conclusion of your 1st Venice stay, then drop the car off when you get to Florence. (This assumes that any drop-off charge would be reasonable.)
Although you could theoretically get around using local buses and trains, it would take you a huge amount of time and you would be very limited in your ability to explore. Florence and Venice, on the other hand, are best explored on foot.
It won't be easy to drive to centre of these towns and cities, mangy streets wellington hotel in new york city would be one way or No Entry and a big challenge to find parking. But most towns and cities in Tuscany would have huge parking lots outside the centre. Venice wellington hotel in new york city has covered parking for which you have to pay a fee, quite close to where the ferries leaveI remember wellington hotel in new york city we had parked in one of these huge garages, but they can be a bit costly.
In my opinion, nothing beats hiring a car to tour around Tuscany, as you would see much more at your own leisure, and not waste time getting to train stations etc,. Economically I am not so sure as prices of fuel are increasing but I guess even train fares are on the increase. If the hotels wellington hotel in new york city have parking wellington hotel in new york city it certainly is an advantage. But I guess it would still not be easy if it were a hotel in a centre of Florence.
Pisa/Lucca and checked into our hotel in La spezia in time to take a quick train to Riomaggiore for sunset and a great outdoor wellington hotel in new york city dinner facing the ocean. The next day we hiked between some of the villages before returning to Florence in the evening.
Agreed though that in Venice you have to park it before you get into the city, so you will not use it there, and driving in downtown Florence, I've done it, is very confusing. Have fun whichever way you go! Sounds like a fabulous wellington hotel in new york city trip.