Once you decide to learn to scuba dive, you'll need to select a dive shop and possibly a instructor if you have been recommended to one. These are usually included in the course cost.
Many classes use videos and computer CD's for visual training in class and at home.
Pool sessions are held offsite in many cases, although many shops now have their own pools. Everything else is provided during the course and pool, but during checkouts you will have to rent a tank or air cylinder, buoyancy compensator, regulator and wet suit. As you learn more about the sport of scuba diving, you'll begin to be exposed to more gear and advanced techniques. Your local dive shop will usually be the best avenue for getting gear and information. Each shop specializes in some form of diving.