The last time I was in Torvaianica I drove from the UK while I did use public transport then I can't remember how to get from Rome to Torvaianica or better still from the Airport...
Answer on I am going to Torvaianica Italy... how do I get there from the airport using public transport?
From Fiumicino there is a local bus to Ostia. From Roma Termini there is a train. Don't know about Torvaianica but it's near Ostia so I would think that there are also buses and trains to there. It's not too far from the airport so a cab wouldn't be out of the question.