Hello there, look under the toronto area trunk radio systems, unfortunately the 2 systems in use are trunked.
The Toronto Public Safety system is Motorola 800mhz Trunked, with Police, Fire, Works, EMS Portables on it. Toronto EMS Mobile Radios are on their own 800mhz EDACS Trunked System.
Once you Program the systems into your scanner, they will initially "lock" onto the control/data channel, just lock this channel out and continue scanning. Unfortunately you will hear only parts of conversations, as each reply/key up of radio usually occurs on a different frequency than the previous and next portion.
Aside from the trunk frequencies, you could add the OPP analog conventional frequencies and the Ministry of Health (EMS) Provincial common + Tactical + Air Ambulance frequencies to supplement your enjoyment.
Hope this helps,
Ian