All I've ever used is a socket and ratchet and sometimes someone to sit in the car with their foot on the brake. If you've go to do the job on your own - put the car in 4th gear and pull the hand brake on hard. With a bit of luck the pulley bolt will come loose before the car moves - if not you'll find yourself moving slowly backwards across the garage as you turn the engine over with the spanner
Maybe - the other problem is that your socket set might not contain a socket big enough to fit the crank pulley bolt. I had to buy one specially - can't remember the size but it's a bit over an inch (1 and quarter maybe?). With the right tools and if the woodruff key isn't damaged (they are usually ok) it's a ten or fifteen minute job.