Bus 69 runs every 7 to 8 minutes during daytime. Traveling time to ETH-Hoenggerberg is about 8 minutes. There is a great view of the City and Lake of Zurich along the Bus 69 route. You can even see the snow-covered Alps on a clear day. 7.20 and is valid on trams and buses in the Zurich city region.
Tickets have to be bought before boarding since no tickets are sold on trains, trams or buses.
Ticket machines at tram stops accept only coins. You might be able to get the same ticket at a ticket machine in the main train station which accept 20 SFr. Tram 11 runs every 8 minutes during daytime. Traveling time to Bucheggplatz is about 10 minutes. You can board the bus from the same platform that you exited onto from Tram 11.