Mute_man bhai sharing my experience here,
Immigration Procedure at Pearson:
10. Now that every process is complete, you'll find the last EXIT door just after getting out of the room. And here you'll find your friend or family waiting to receive you. He'll take you to the elevator that goes to the parking area and once you're in the parking area you'll first feel the Canadian air.
This whole process might take 3 to 4 hours depending on how quickly you are able to collect your luggage. And during this whole process don't lose the small CBSA form that you filled up in the plane let alone your passports, COPR and CASH.