The Munich U-Bahn system (subway trains) is run by an organisation called the MVV. This is an abbreviation for "Münchner Verkehrsverbund" which translates to "Munich Transport Union".
All information about travel tickets and ticket prices is contained, in English, on the MVV website. Here is the link:
MVV Muenchen - Tickets and prices
Do not post to the Toytown Munich forum asking about MVV ticket prices or schedules until you have thoroughly explored the above MVV pages and found that your question is not answered there. If you post a question to the TT forum which is already answered on the MVV website then your forum account will be mercilessly deleted and you will publically ridiculed by the other forum members.
Alternate keywords that should bring you to this page: Public transportation, buses, Ubahn, subway system, tube, metro, trams, streetcar, trollies (even though Munich doesn't have any)