From Fiumicino Airport there are train or bus to Roma Termini. From Ciampino Airport take the bus to Roma Termini. From Tiburtina Station you can use metro line B to Roma Termini. When you are at Roma Termini you can walk for 15 minutes until via Giovanni Giolitti 387 or take metro line A until Manzoni Station or tram bus number 5 or 14 for 3 stops( Principe Eugenio/Manzoni) Is very easy.