Aeronautical Engineering

You need to fulfil the following eligibility criteria in order to seek admission in BE in Aeronautical Engineering:
Candidate must have passed 10+2 along with mandatory subjects from a recognized board/university or authority accepted by the syndicate of the Anna University as equivalent thereto are eligible to apply.
Mandatory Subjects: Mathematics, Physics and Chemistry.
Minimum percentage in class 12th: 50%.

Aeronautical Engineering is related to design and manufacturing in the aerospace industry and spacecraft industry while aircraft maintenance engineering is basically looking after an aircraft's maintenance and it's operations. Both are different fields and no comparison can be made.

In India, there are a few institutes which provide Bachelors in aeronautical engineering. So, I think you should go for IITs or maybe IISc, Bangalore.

Madras Institute and LPU have the highest placements for aircraft maintenance engineering. You can opt any one of these. It has a good academic reputation with qualified lecturers.

Yes, you will be able to get admission in AE. For getting into IITs, board exam marks doesn't matter, the thing that matters is JEE Mains and Advanced score. You should secure a rank under 10000 to get IITs and under 60000 to get good NITs.

For getting admission in this institution, you are supposed to write the entrance exam. You must do well and score good marks as it has a huge demand. The cut-off varies every year, for this information, you need to contact the college directly. They will provide you with the complete information regarding this.

It is indeed good to know your desire to pursue PG in Aeronautical Engineering. But the eligibility for this is graduation in engineering. If you have graduated in engineering then you can apply for GATE which as the entrance exam for PG is acceptable to many institutes. Of course, there are some which have their own exams too.

It depends on the college. So, first make a list of colleges which you want to join. After that by visiting the official website of the particular college, check the eligibility criteria.

It will be better if you get good results in JEE. Otherwise, your class 12th marks are also fine to get admission in MIT.

Carver Aviation Academy by this name, the institute is available in Baramati as well as in Mumbai. In Mumbai, the institution offers pilot training as well as aircraft maintenance engineering. I am attaching a link that will give you all the required information about admission into this institute and fee, etc., required to be paid.
https://www.shiksha.com/college/academy-of-carver-aviation-girgaon-mumbai-28203