71 Turin in 24-hours! What are the 'must see' sights?

I am off to Turin for just over 24-hours in April. Never having been b4, has any1 got any suggestions on how to make the most of it? Sights, reasonably priced restaurants & getting about. I have heard about ' torino cards' (i think thats what they are called),which you can use on public transport as well as some attractions,but can these be used for transferring from the airport to the city centre?