Firstky you need to take up German language training certificate by following coaching institutes in metro cities like Delhi and Mumbai.

https://www.goethe.de/ins/in/en/m/spr/kur/gia.html

To go for German University you would require GMAT/ GRE scores as well as IELTS score of more than 6 out of 10.

So for IELTS training check below Institution:-
https://studyabroad.careers360.com/exams/ielts

To get complete details about top University jn germany and eligibility criteria and various exams you need to appear check below link for Reference:-


https://www.google.co.in/amp/s/studyabroad.careers360.com/articles/how-apply-for-ms-in-germany%3famp