Depends on what brand, type, and how much tread is left on the tire. Can range from $20 to $75. A good name brand used tire with 75% tread left will cost at least $50.
Usually like 20 bucks. Look on Craigslist in your area. Click on auto parts and put your tire size in the search box. Have fun and be safe :)
Less than a new one.
i think 20.00 to 25.00 should get you one
£10,000 for a new car