Originally Posted by
darkhunter
2. Leonardo express train? 15 euro ? 1 way ?
Is that about it? Any cheaper or free options?
14 euros OW.
There's 2 trains: the Leo Express to Termini, which is a non-stop service to the current main Station, plus a cheaper overground service called FR1/FM1, which is 8 euros, or less for shorter journeys. It does stop in many stations but Termini.
FR1 and FM1 share the same route in the city, but the FM (M=Metropolitano) trains stop at Tiburtina and then go back to FCO airport, while the FR1 trains get the north of the Region (R=Regionale).
Here you can see a simplified PDF map of the train routes - overground & underground - in the city:
http://www.atac.roma.it/files/doc.asp?r=4