Hello Painglass. I am probably too late to help you with advice about Dumpster diving in Toronto. I have been a dumpster diver in Toronto for about twenty years. Some places such as Home Depot will lock their dumpsters, but this is pretty rare. Most people in Toronto put a lot of good stuff out on the curb. Sometimes they even put a sign that says 'Free' to encourage you to take it. I got a free bicycle this way. Good dumpsters to hit are around the University of Toronto, as well as apartment buildings. Lots of people (especially students) move out and decide it is cheaper to toss it out rather than move it.