The apartment is 5 km from the airport, you can get on the bus n.1 direction CITTA' ALTA,the bus stop is outside the arrivals.
You have to buy the bus tickets inside the airport. Once you're in the bus you have to get off at bus stop n.82(you must request it!) and i'll be waiting for you exactely there!
it means you don't have to change bus! the apartment is near the bus stop.