Masters

First if all for your Masters, you need to take an English language test I.e IELTS and you also need to take German language test and your academic scores souls be good so that you can seek admission easily in any of the university in the Germany. Hope this might help you.

It is around 6k to 8k per year.

You may refer this link https://www.shiksha.com/b-tech/articles/mu-oet-2016-syllabus-test-pattern-blogId-11677

The candidate should have a Bachelor's degree in Agriculture or Horticulture or Forestry from a recognised university in India. The candidate must also have passed the degree with minimum 50% marks. Some colleges do allow the admission with any basic graduation.

FTII does not offer graduation courses. Probably you can look for some other institutes or college.

Follow the link below for syllabus for BHU PET
https://www.shiksha.com/university/bhu-banaras-hindu-university/bhu-pet-exam-syllabus.

No, you cannot go for PG in civil engineering. You have 2 options: First is to proceed with Masters in Hotel Management and second is an MBA. If you are willing to do PG in civil engineering then you have to first complete Bachelor in civil engineering. Or, if you face a problem you can call on this number.

The duration is of 1 year for all the courses.

The eligibility differs from college to college. You can apply if you passed a Bachelor's degree from recognised board.