11 players on the field for each team and a certain amount of subs on the bench (they are used for many strategic reasons whether to boost the attack or defense or to just replace a tired or injured player) if a player receives a red he is ejected from the game immediately, players get red carded from either two yellows cards or from a straight red which happens if a player in any way foul a player to stop a scoring or from malicious acts. To learn more you should do some research to get a true understanding for the game
11 players in a team (22 in toal in a field) A red card means that you have to get off the field &will leave you with 10 players in your team, Two yellow cards is a red card. When the ball is out of the field means its a throw in (means that you can use your hands and throw the ball by standing on the line from were it was kicked) You can only use hands if you are a goalkeeper or while taken a throw in. If you are intrested in football than start watching games you'll learn alot quicker!
That website will give basics. There are other more complicated rules, best to learn by doing research because it takes too long to explain
