We will be arriving at Pisa airport and taking the train to Florence. It looks like a regional train from there and does that mean that there is no advantage to buying tickets in advance? How about transfering from the airport to train station?
Also, we will take the train from Orvieto to Rome and this looks like we should buy in advance. It also looks like we arrive at Termini. We are staying in Trastevere. Probably a bus to there?
Thanks.