Toronto Barber & Beauty Supply is, as far as barber/beautician suppliers go, a pretty big store (though they do have another location on warehouse-heavy Orfus road). There's enough room to browse, unlike other places where all the bottles and gizmos are crammed in so that you have to ask the salesperson/gatekeeper where things are.
There does seem to be a little more emphasis on the barbering aspects, although the prices aren't exactly discount. Maybe it's for the Bay Street crowd that wants to cut their own hair--I doubt it gets a lot of business from the bus depot next door.