Is it legal playing online gambling in Quebec? 

Yes, under Canadian law it is legal to gamble online.

Can I play for real money at casinos in Quebec? 

Yes, you will have to use real money at land based casinos.

Do Quebec’s residents need to pay any taxes for their winnings? 

No, players are not required to pay any taxes on their winnings, nor do you need to report winnings to the Canada Revenue Agency.