Check out the Red Zone site and click on Toronto, it also has subcategories for ebony/mulatto/indian/latina etc...
www.theredzone.com/
Another good thing about the listings there is that some have several pictures and many even have voice clips if the SP's voice is a factor at all..?
Also, on the street boxes pick up either/or/both:
Now Magazine or Eye Magazine, which are equivalent to Van's Georgia Straight one of them (Now - I think?) has tons of ads in the back pages.
2 SPs that I can recommend from experience are:
Nyomi Blue - who might be a bit darker skin tone than what you are searching for but absolutely sexxi as hell:
www.nyomibluxxx.com/
and an Indian named Naya, who is near the airport and very friendly, quite gorgeous, open-minded and although scientifically enhanced they are really well done and fun to play with:
www.theredzone.com/cgi-bin/createspec.cgi?cat=EastIndian&id=5068
If you are unfamiliar with Toronto neighbourhoods just a few areas I would stay away from are, anything around the intersection of Jane and Finch in North York / as well as Parkdale / and Regent Park areas - these are similar to Van's Downtown East Side. Although I have never been attacked in any of these areas an outsider might not feel 100% safe.
The variety and costs in Toronto are both way better than here in Vancouver.
Enjoy.....!!