I was born in 1979 and started going to Disneyland in the early 80's. I don't ever remember have to use tickets for the rides. In fact I found an old tickets I think from 1986 and it says something like unlimited rides for admission price.
1. When did they get rid of the ticket system for rides?
2. How did it work exactly? Did you pay a admission price plus a certain amount for each ticket?
3. What was the purpose? To keep ride lines down?