By train, Munich
The train station is very conveniently located...near Oktoberfest, shopping plaza, and other sites.
We actually arrived by car, which was easy too. (our hotel was right across the street from the Hoptbaunhof (main train station)
There's a train from every direction in Germany. There are really comfortable night trains, too, and very fast sprinter-trains from other big German cities.
Munich has very few parking spaces, most of them quite expensive. So if you have a car, leave it at the hotel and use the really good public transport:
There's a lot of underground, streetcars, trains and buses over the whole city and far into the outskirts - even late at night and early on sundays. Trains from the outskirts run at least twice an hour, the buses, underground and streetcars run from every twenty to every three minutes, according to time and location. In the evening and on sundays the trains meet each other in time so you can change trains at the junctions without having to wait long.
You can get a ticket on the stations or in the streetcars - there are daily general tickets for up to five people which are not very expensive.
NOTE: Don't buy tickets in advance, you can't keep them too long, because they raise their prices every June and won't take the old tickets after that!
Unless you are coming from outside continental Europe, I suggest you take the train. The parties on these trains taking you to Octoberfest and almost as fun as the event itself.
Once you arrive, you can walk to the beer garden.
The main train station is Karlsplatz and in a convenient spot to transfer to a train from a tram or subway.
Munich was wonderful but it was time to grab the packs and head for Austria. Trains are fast, clean, and on time, a great way to travel.
Munich Hauptbahnhof (Central Train Station) There is also a tourist information.
Public Transport, Bicycle, Rikscha, Taxi, Walking...
Almbahn. To get to the top of the mountain you need to use a train from Garmish-Partenkirchen and then this nice cab, but of couse like a real traveller, you can always walk.