There are different options to travel from the main airports to Bolzano/Bozen, here some hints:
Südtirol Bus – http://www.altoadigebus.com/
FlixBus – http://www.flixbus.com/
The main railway Bologna – Verona – Bolzano/Bozen – Brenner – Innsbruck – Munich allows fast connections with all major cities both north and south of the Alps.
Bolzano/Bozen offers daily fast connections with the Eurocity train from and to Verona station. Besides those connections, regional trains depart every hour from and to Bolzano/Bozen.
Daily fast connections with the Eurocity train from Bolzano/Bozen to Innsbruck and Munich station and also daily fast connections from Innsbruck and Munich to Bolzano/Bozen.
The Bolzano/Bozen train station is located in the centre of town.
The city Bolzano/Bozen is located directly on the Brenner Motorway, one of the most important European traffic veins for the transport of both goods and people.