You will need a AC recharge kit and freon. You will also need your basic tools. And you should get an evacuator to evacuate all of the old freon out of the system.
you have to get a new air conditioner compressor. Under the hood you will see your alternator and usually right about that is your air conditioning unit. You will need to buy that part and have it recharged with the R grade your car takes.
Compressor,condenser coil,evaporator coil,filter dryer and tomotive freon gauges will be needed and a temperature probe. you also will need at least a basic knowledge of air conditioning.