Technical University of Munich

Diplomas are not accepted. Clear IIT JEE Advanced or enroll into Studienkolleg.

To study civil engineering, the best institute is TU Munich.

I doubt, if this course is offered in this university. Please visit the link to know the courses offered:https://studyabroad.shiksha.com/germany/universities/technical-university-of-munich.

It all depends on your test scores and the scores that you've got in your last college/university attended. All this will decide if you will be selected or not. Check on the website and apply.

Your class 12th percentage must be above 75%. In Germany, universities ask for 13 years of education but in India, we have 12 years of studying experience. So you have three options:
1. Clear IIT-JEE Main and Advanced
2. Spend a year at a university in India
3. Do Studienkolleg
After that, you need to pass TestDaf up to level c2 to prove your knowledge of the German language. The chances depend on your marks. You can apply via university assist.

Both are good but TUM is ranked above TUB.

Yes, you can, but please check requirements on the website.

You must attain C2 level in the German language.

Please check the university website. You must also know the German language.