Colleges in Mumbai

Hi,
It depends on the college you are selecting. Some colleges accept MHCET scores while some conduct their own entrance exams and some accept CLAT scores too. So, it depends on the university/college you select.
Good luck.

There is no particular period for admissions.

The minimum qualification required is 12th.

It depends up on the course weather to attend or not.

There is no such slab for salary structure after pursuing any course. It all depends from which college you pass and marks you score so that you can get placed in a renowned organisation with an attractive package.

You need to see scope with the colleges providing the specific course. You can do MBA in aviation instead of B.Sc.

Yes, you are eligible for it but since you are from CBSE board the other students will be given more priority than you.

Yes, they can apply for cosmetology.

Hello Sihaib,
It's indeed quite good to hear from you that you are interested in doing graduation after completion of the diploma. Yes, there are plenty of institutions that offer this four year course. I am sure you will be greatly benefited by this. I am attaching a link that will give you all the required information.
https://www.shiksha.com/b-tech/colleges/distance-correspondence-b-tech-colleges-india