And don`t forget to buy; a Jack, a wheelbrace, a torque wrench, a tyre pressure gauge etc.
Does your car have identified jacking points or will you have to buy a hydraulic jack ? And each time you have a puncture someone will need to go back to your garage to collect the spare wheel.
I wouldn`t bother, just look after and maintain your tyres on a regular basis and have effective Breakdown Cover.