The negative number shows how much has to be risked to win aR$100 payout. Thus, if the money line for the team that you picked was -400, it means that if you placed a successfulR$400 bet, you would gainR$100 on payout.
The odds indicate how many times your stake will be multiplied in your total payout. For example: AR$100 bet at 1.50 odds will pay outR$150 ($50 profit, plus yourR$100 stake).