Hey im about to buy a house, houses here are average 500,000 cad and 5% down payment, i was wondering if i rent the top and bottom out how much could i rent them for, and How much money will i have to pay each month for the house, thank you. :)

This depends on the location, size of house, condition of house, etc. You need to research your local real estate market. Plus if you rent it out, you should know the tax consequences.

No one can answer the question without knowing the interest rate, what type of loan vehicle you will be using, taxes, insurance, etc. In addition, rent varies from area to area, so it's an impossible to answer.