Public transportation is offered in Germany. While it is required to purchase a fare to use public transportation, you will not be required to feed your ticket into a machine upon entry.
Helpful transportation links:
Deutsche Bahn General Information
NAH Bus in Wismar: Tickets can be purchased on board.
Recommendation: Google Maps can also always be used for help with directions. It will be able to showcase the exact route someone needs to take when using public transport, and it is able to redirect you to the particular train/tram/bus/etc.
Reminder: Use Google Chrome’s translate function when accessing this page