Uniforms all depend on the team. The colors vary in all teams and can be long sleeve, short sleeve, or shorts, but pants can't be worn during the game. This is because the referees can't see if you are wearing shinguards. Over your shinguards, which are required, you must wear socks. The socks usually are the same color/s as the uniform.

As I said, shinguards are required when you play soccer. They protect your shins for when people go to kick the ball and "accidentally" miss and kick you in the shin instead. You can choose the size you prefer to wear. You may prefer smaller ones that don't come as high up on your shin or larger ones that will provide more protection.

Cleats are also required in the sport of soccer but only for outdoors. Cleats are very key for when the grass is wet because they act as spikes and dig into the ground so you are more stable and don't slip. The actual cleats on the bottom can be circular or more square but screw-ins are not allowed.

Indoor shoes are not required when you play indoor but they are more advanced than tennis shoes . They provide a better fit around your shinguards, they are lighter, and their soles have better traction.

A soccer bag is a very convenient piece of equipment. Most players own one to carry their soccer ball, water bottle, shoes, clothes, etc., to and from the game. Sometimes, it  may also contain various compartments.

2 goals are required in a soccer game, one for each team to score in. The goals should be placed on the ends (goal lines) of the field. The size of the goals can range according to the rules of the game and the age of the people playing

Obviously soccer balls are required to play soccer. The sizes can range from 1-5 according to who is playing. Younger kids usually use size 3 or 4 balls and older kids or adults use size 5. There are various colors and brands to choose from. Some teams coordinate the colors of their soccer balls with the colors of their uniforms.

Most people choose water or gatorade to quench their thirst during a game. Soccer requires a lot of running so when you are off of the field you take advantage of the time to rest up and get a drink. 

Jewelry is NOT allowed when you play soccer. It is a hazard to the players. Necklaces, bracelets, earrings, or rings could get stuck to players' clothing, could fall off and injure someone, or it could strangle you if pulled. Referees are very serious about this.