bookmaker
Teller
A wager is either something deposited as a bet, or something on which bets are laid.
You call them 'The person I owe money to'
Not that I've ever heard. All bets are not winners - most bets lose the money.
Punter
umm by phone or if the question is meant to be (waht do you call a person with a lot of money) that answer is rich
gambler
Poor
Place bets are in a separate pool from win bets so there is no fixed payout for an even-money favorite.
The pot.
of cci in cricket
That is called a bookie or bookmaker.