If you mean How many players a football team must have, I have to say that the general rule is to have 11 players playing on the field and 7 substitutes sitting on the bench. But however some countries like Italy may have different rules in their local league (Serie - A) which allows the teams to have more than 7 subs (I guess 11)
11
28
Lots
22 players in a foot ball game
the best professinal football tem in the world is Barcelona
Superordinating goals
Depends how good they are
12 on each team
The Detroit Ravens are a Semi-Pro Football team their players don't get paid
zero
On average, about $1,000,000
Thirteen if you are happy camper