The cost of living in Canada depends on your lifestyle. In any case budget a minimum of $700-$1500/month:
Student room: $400-900
Food: $250-300
Public transit: $50
Phone: $30
Other possible expenses:
Car insurance: $150-300/month
Going out: you name it!
These prices are only indicative and very much depend on the area you live and arrangements you can make: room sharing, car pooling, etc.
The cost does not include flight training or study materials.