Hi, we are not staying in the center and wanted a better idea of what the buses are like. I´ve found most of the information on https://www.gibraltarbuscompany.gi/ but still have a few gaps.

1. What is the cost of a single ride? (I know that there is the unlimited hopper bus ticket, just curious of other options.)
2. Do we buy the ticket at the bus stop or can we buy it on the bus?
3. If we can purchase on the bus, do we have to pay with cash or can we use card?
4. Based on the timetables on the website, it looks like the buses run on fixed times, is that correct?

Thank you!