You can check the types of tickets and rates in the Schedules and rates section

Yes, bicycles, cycles, mopeds and motorcycles are not subject to the time limitation of the parking and, therefore, they are exempt from getting a ticket from the ORA.

However, remember that there are specific parking spaces for motorcycles and mopeds, so you should preferably park your 2-wheeled vehicle in these spaces, if you do not do so, you could be sanctioned by the Local Police

There are two ways to pay the parking fee, using the parking meter or by the App:

• Parking meter: You can pay for your parking lot in cash or with cards
  banking (EMV technology) in certain parking meters.
• If you opt for cash payment, follow the detailed instructions in the
  parking meter. It must be taken into account that the parking meter does not return change, for
  what the amount to be entered must be exact.
• If you choose to pay by bank card, follow specific instructions in the
  device. Keep in mind that not all parking meter models can have payment by bank card, especially in case of specific breakdowns.
• APP: Through the Telpark app (available on Google Play, App Store, or through the web),
  you can manage and make the payment for your parking lot without having to go to the
  parking meter. It will be necessary for you to enter in the APP your personal data, information of
  payment and data of the vehicle that is going to make the parking. In addition, the APP
  It will allow you to extend or reduce the initially selected parking time, always and
  when the maximum parking time for the area where it has
  parked.

No, it is no longer necessary to place it in a visible place, because when making the payment the license plate of the vehicle is typed. Make sure that you have entered the registration correctly because otherwise you may be sanctioned.