Help with TIM in Rome
 

how and where can I get a TIM prepaid 5 GB data service for 30 day contract at Rome Fiumicino/da Vinci airport - when are the stores open - what information and documentation is need thank you

Usually shops in town are open 9-19.30, at the airport probably they are open 24h, I don't know.
There's full of information on this website and on this forum on how to buy a prepaid in Italy, just make a little search and you will find everything.