It took about four (4) months
Answered - TRANSIT OPERATOR (Former Employee) - Toronto, ON
If lucky, months. If unlucky years.
They do "information" sessions a couple of times a year (depending on how badly they need new hires). At the session you get information on working with the TTC and do a couple of test - essay and amplitude.
If you pass, you will be given an interview date and a "job shadowing" assignment. Pass those and it's health check and police clearance check. Pass those and you wait for them to call you.
So from passing initial test at information to training day can be 6-8months.