Music

You are definitely eligible for applying for Bachelors of music in vocal through Annamalai University and the process for selection is the merit based courses.

SPPU teaches both classical and western music. You can learn so much from here. Good luck!

Yes, you can get admission in music course in RBU. You are eligible for this you can apply for admission.
Good luck.

This is the eligibility criteria of BA(Hons.) in Vocal Music:
Candidate must have passed 10+2 or its equivalent with special aptitude in Vocal Music from a recognized board.
Check this link for more details: https://www.shiksha.com/arts-fine-visual-performing/music/course/b-a-hons-in-vocal-music-rabindra-bharati-university-b-t-road-kolkata-269612

Yes, you can apply for the music course at this university.

Yes, admission test is mandatory as according to your performance in admission test, you will get admission there. Good luck.

It is a huge gap, but you can try. If you were doing something good in your gap years, then they will accept your admission. So, you can try.
Good luck.

You must have 10+2 from the recognised board. You can apply online / offline with required information and documentation.

Yes, you can. However, some institutes take an audition or aptitude test before the admission process. Also, check for the institute that will give you admission with the marks mentioned.