Perhaps a good way for the TTC to make some money would be to sell the McBride Building (I think that's the name of it) at Davisville to a developer (possibly including the air rights over the Davisville yard) and moving TTC head office to this "transit tower."
I really think it makes sense to have all these transit agencies in one buliding. If nothing else, it forces them all to talk to each other. As it stands, if you call GO Transit now for route help, they are forbidden to tell you about any TTC routes and vice versa.