By bus:
You can reach the Museum (Mole Antonelliana),
taking the following buses:
no. 13, 15, 55, 56, 61 (get off in Via Po)
no. 16 (get off in Corso San Maurizio)
no. 68 (get off in Via Rossini)

By train:
From the main railway station Porta Nuova, you can reach the Museum (Mole Antonelliana) on foot (approximately 20 minutes) or by buses:
no. 61 (get off in Via Po)
no. 68 (get off in Via Rossini)

From Porta Susa railway station, you can take the buses:
no. 13 or 56 (get off in Via Po)

From Lingotto railway station:
no. 14 or 14b to Corso Re Umberto, then no. 15 (get off in Via Po)

By airplane:
If you're arriving at Turin airport (Aereoporto Sandro Pertini - Caselle), you can take the following buses:
"Satti" (which leaves every 60 minutes) to the main railway station Porta Nuova.
"Sadem" (which leaves every 30-45 minutes) to the main railway station Porta Nuova