Search on www.Craigslist.com and click on your area (canada) and then click on "childcare"
It's free and Nannies post themselves on the website when looking for work or you can post there that you are in need of a nanny.
I am a nanny in california and have nannied for 5 years now. I have found 2 of my families on Craigslist.com
Here is the link to Childcare Classifieds in Toronto on Craigslist!
http://toronto.craigslist.org/kid/
