Italy trains?

Does anyone know about travelling by train within Italy? I need to make reservations to travel from Rome to Florence and then Florence to Venice. I have come across some websites but in the middle of me trying to make reservations it converts to Italian and I'm totally lost.

Please help!

Re: Italy trains?

We did it, we bought the regional pass that covered three days in a month, meaning you can take it anywhere in italy in three days.
Be advised that in addition to this pass, you need to buy the reservations for each time you take the train and that's not included in the pass.

I wish I knew this before I went, the most expensive one was from florence to naples, which was 70 euros.