How much do subway tickets cost from germany to austria? or in austria from city to city.?

There are no subways between countries or cities in Germany or Austria, Subways are local only. Trains travel between cities and you need to talk to a travel agent about a 2 country eurail pass. Say you want to travel for 4 days on your visit. You buy the eurail pass and you specify the days and you can ride a train anywhere on that day. If it is a 2 country pass you can travel between Germany and Austria. Note there is generally an extra charge to take the ICE trains. Approximately 5 euro's. Talk to a travel agency about the eurail passes. I thin also that you should upgrade to first class. It costs a little more but you are garanteed a seat. The trains in europe can get crowded.