If it is manual tranny, you can put it in gear and have someone hold the brakes to keep the pulley from spinning. When I repalced my water pump a month or so ago, I cut a wedge out of a 2x4 and the wedged it between the pulley and the frame to keep it form spinning. Then, used a breaker bar and sledge hammer to loosen to bolt.

 

ok, spend the 67 dollars from snap on and get the crank removal tool specifically made for your car. trust me, with that tool, a 19mm, and a 3 ft extension, it took me 3 min to remove it. if you really want i can get you the part number of the tool tomorrow