you pretty much only need a net and a ball to play volleyball. If you want to get more in-depth you would need knee pads, a referee and 12 players to play a traditional 6 on 6 game
To give yourself the best chance you will need clubs, 14 is the maximum, these are woods, irons, wedges and a putter. You will need a bag to put them in. You will also need a number of balls to hit...