Some great TD info:
If that 1pm time means track opens (ie, red group is on track at 1pm) which it probably does, you should be there by 11:30 I'd say. Gives you time to unload, get through tech inspection, get set up for the day... You'll want to check the bike prep requirements for TMP just so you don't have any surprises when you get there.
http://www.torontomotorsportspark.com/raceway/tech_101.html
That's a good point. Is there anything "official" on start times, tech, etc.? I was planning to arrive 11 ish. I've not been to this track before so I'll need a few minutes to get orientated.