The so called Transportation Ticket on the front of the ticket book (with individual tickets required for various rides) was given to the monorail or ferry attendant before boarding at the parking lot concourse (TTC). If you needed to leave the Magic Kingdom you got a hand stamp and that allowed you to board the monorail or ferry to leave and return to MK later. There were one-day, two-day, and 3-day ticket books with one, two, or three transportation tickets as applicable.
Although I am not sure when the Transportation Ticket was discontinued, the ticket books themselves were discontinued ca. 1982 (when Epcot opened) in favor of "pay one price" admission and no tickets/payments collected at rides.
The first pay-one-price tickets were manually stamped with the date at the park entrance. Later they had tickets of a slightly different shape (longer) that you inserted into a slot like a time card into a time recording clock, and the date was stamped mechanically. (The stamper also cut a tiny notch out of the corner of the ticket so the next time the ticket was inserted, the next date stamp would land on a slightly different place.)