Anyone doing their masters in Germany?

If there is anyone doing their masters in tech related field in Germany, please please please reply.. I need to ask a lot of things.

1. How's the course? Is it actually helpful? Can average indians cope up with it?

2. Is there a Math in CS or AIML field?

3. How much GRE score do we need?

4. How's the weather? Can survive?

5. How's the culture? Is it good? Or is there a lot of depression?