The boys can help you out more then me on who to see but on the questions of ID and phone etc I will say most of our top agencies are not going to accept anything other then a verifiably phone number. No text apps, no WhatsApp, no Google Voice, etc. We have ways to search the number and we can tell. Registed cell phones, real numbers etc, only. However, ID is not required.
I would stick to agencies, or one agency like you hope to do.
As an indy, I hope other indies don't slag me, but for you as a traveller who has just found one of the largest buffets of girls, variety is better had at an agency while still being able to develop a rapport with the administrative staff.
And some, not a lot but a few indies escorts like myself won't even see guys from US numbers. Personally, I am even just Ontario based phone numbers. And maybe do require verification via ID, SP reference (which you won't have) or deposit. So agency is your best bet
I would also suggest maybe taking this to the Toronto incall agency section. You will get much more tips there.
GL and enjoy Canada, our girls and our poutine!