From Scientific American about 18 months ago. According to the article, the USGS estimates there are over 600 billion barrels of oil on Earth.

I've been hearing that we're running out of oil since 1973. Every estimate I've ever heard is that there are 20-30 years of oil left. That estimate has been slidding to the right ever since. The reason is pretty simple - oil companies keep looking for new oil as they need it. It doesn't make much economic sense to spend a lot of resources searching for oil more than about 20 years out. I've learned to take gloom and doom estimates with a grain of salt.

The simple economic fact is that any form of alternative energy has to be cost competitive with non-renewable sources or it won't be developed without massive and unsustainable government subsidies. Would you willingly pay 3 times as much for energy just because it came from a renewable resource? Most people won't.

As for Canada in particular, even if it is running out of cheaply accessible oil as you claim (and I doubt), you can look beyond your borders like other countries do. For example, Japan has almost no native energy sources. It imports virtually all of its oil. Japan relies heavily on nuclear power but has to import most if not all of the uranium it needs. Somehow, Japan has managed to survive.