Turin is home to wealth of great shops and boutiques. Be prudent about what you buy, because returns and exchanges are frowned upon in Italian stores.
Italy may be tourist friendly and known for its amazing fashion but in keep mind that it will generally be considered bad form to walk around in short skirts, shorts, or skimpy outfits (yes, even in that heat!).
Don’t wait for the check after a meal; you must ask for it. A service fee is usually included but a small tip on top of that is always appreciated.