1)Usually you will be instructed to join CMP VOR HP then descend with visual contact and join standard VFR routes. The transition from IFR to VFR is quite similar: join CMP or URB NDB holding pattern, climb to a minimum altitude, then continue your flight IFR
2)No idea
3)as far as i know there is no handling in LIRU
4)Same as number 2, however i suppose there will be no problem
5)No idea
6)You have to phone them... Rome is a huge city, the cost will depends on how far you want to go. There is a train station just few minutes away