some guy has gone and mapped out all of the old electrified railways in Canada. I found a download link for it about a year ago, but here is what Toronto's streetcar network looked like. yellow is currently existing track, orange is destroyed track.
on a side note, it really is amazing how many Ontario cities had tram networks. small cities like sarnia, peterborough, and cornwall had streetcar networks. there was even a rail line between woodstock and Ingersoll! (two towns of about 37,000 and 13,000)