Here's a map from the Torontoist blog about who voted for Ford. The purple bit (the Smitherman voters) lines up almost perfectly with pre-amalgamation City of Toronto. The ones who overwhelmingly voted for Ford were the suburbs and bedroom communities in the Greater Toronto Area, like Etobicoke, Markham, Vaughn, etc...

http://torontoist.com/2010/10/which_wards_voted_for_who_for_mayor/

Here's an article that has a great image of pre-amalgamation Toronto:
http://www.newgeography.com/content/001890-toronto-election-highlights-failure-amalgamation