Some links that might be useful for you...
www.make-it-in-germany  gives you general information about working, living, studying and training in Germany as well as interesting hints for discovering your new country.
www.howtogermany  is an online information platform for newcomers in Germany. It offers a wide range of information about all the topics that will/might be of relevance for you when relocating to Germany.
www.research-in-germany  offers you a wide range of information concerning the research landscape in Germany, possibilities for reserach fundings, main research areas and job& career opportunities as scientist in Germany.