Getting to and from Munich is fairly easy.
Munich has great air links with most International airports and should there not be a direct flight for you, many connections are available through Paris, London, Amsterdam as well as Berlin and Dusseldorf.
Germany's autobahns are legendary and make Munich easily accessible from all over Germany as well as Italy and Austria.
Train services operate from many cities in Germany as well as International links with Vienna via the high speed ICE trains and the Eurostar from Paris and Brussels.
Once in Munich the best way to get around is by public transport, the trains, trams and buses are quick, clean and efficient. If there is a group of you then the best value is a Partnerkarte, which covers 5 adults or 2 children under 14 count as 1 adult.