We are here now. Train is easy, affordable from Rome to Firenze and from Firenze regionally to other Tuscan areas (consider Lucca and Altopascio, and if you haven't been there, Pisa to confirm the tower is still leaning). Italiarail I found is best web interface for tickets on their trains and on Trentalia.
Be aware Italian banks will not exchange $ for € and money change stores are all in collusion on their rates with VERY high costs. Their exchange rates are reasonable with a 2 to 3 % markup over market, BUT they then impose a €10 fixed cost and 19.9% of transaction commission. So over $200 cost to exchange $1000. Despite Mr. Steve's advice, I would check at yout bank at home to see if you do better. Credit cards are widely accepted even in small shops.