I've done several short trips to Torino and always stayed at Express by Holiday Inn in Via Paolo Gaidano. La Mole Antonelliana is Torino's landmark and wortha visit. There are several squares not to be missed, Piazza San Carlo, Piazza Castello, Piazza Vittorio, to name a few. A must are the Caffe' Torinesi.

Turin Underground: http://www.somewhere.it/EN/Torino-Sotterranea/ItinerariView.aspx?lng=EN&azn=V&cit=2