This is my suggested 4-day Turin itinerary, but you can customize it to your liking so it matches your own pace and preferred museums & places to eat. It also leaves room for spontaneity and free wander (my favorite parts of a trip!).
A few things to note about though:
You can visit less museums and add more free time.
If you’re not eligible for other discounts (consult each site's official website to check that), and if you want to follow my itinerary, you can use the 5-day Torino+Piemonte Card to save more than 50€!
I give suggestions for things to do on your free time in the historic center. This can look a bit messy as a route on the map, but the locations are close enough to one another. If you choose the 'View Route in Google Maps' option (located at the top of each day's itinerary), don't forget to switch to 'walking', and then the "route" will make more sense.
You’ll need to play around with your days according to the closing times of each museum:
Royal Palace: Closed on Wednesdays
Egyptian Museum: Closes early on Mondays
Venaria Palace: Closed on Mondays
Lavazza Museum: Closed on Mondays and Tuesdays
National Automobile Museum: Closes early on Mondays
Villa Della Regina: Closed on Mondays
National Museum of Cinema: Closed on Tuesdays
Accorsi - Ometto Museum: Closed on Mondays
Porta Palazzo: Closed on Sundays and only open in the afternoon on Saturdays
Mercato Centrale: Closes early on Mondays
Antica Tettoia dell'Orologio: Closed on Sundays and Mondays
Balon del Sabato: Only open on Saturdays