If you do the training in Germany, you'll have to pass 3 subjects;
- aerodynamics
- aircraft general knowledge
- emergency procedures
I think you need 30 hours with a flight instructor and 10 hours solo. A school with a very good reputation in Germany is
http://www.motorflug.com
If you would like to do the training in the states, I can recommend the following schools :
http://www.hillsboro-aviation.com and
http://www.heli.com
It's simple to convert the faa license in a jaa license if you have 100 flight hours. You'll have to pass 2 subjects; air law and human performance. And you have to pass the flight test, of course.
For a jaa ppl-h in Germany you can expect round about 18.000 euro