There are a number of ways to transport heavy stuff without a car. One option is to use a dolly. This can be helpful if you need to move the heavy item(s) a short distance. Another option is to use a hand truck or handcart. These can be used to move heavy items up and down stairs, and over uneven surfaces. If you need to move the heavy item(s) a longer distance, you could rent a moving truck from a company like U-Haul.