S8 to Marienplatz for the Town Hall, then

take U6 to Universitaat to visit English Garden and have a drink in the Chinese tower.

I would advise you to try their white sausages, a Bavarian delicacy.

In the airport, the Air Brau is a nice place. You may have some dark beers there.

Another thing, there is a supermarket between T1 and T2. You can get some reasonably priced Bavarian stuffs, such as white sausages, ham, biscuits, chocolate and so on.