Basically, you roll a pair of dice to determine play order. From there, you roll the same dice to determine where you land. If you land on an unowned property, you can purchase it for the price listed. If you roll doubles you go again (and if you roll them a third time, you go to jail and have to pay $50 to get out). If you land on a property someone else owns, you're required to pay them the amount specified on the property card. You continue turns until you reach Go, where you are given $200 for making it around the board.
Play continues until someone can't afford to pay a required fee or rent and declares bankrupcy. The last standing player wins.