Science

The fee is around 5-15k in any government college and around 10-40k in private colleges.

Hello,
Check this college predictor by Shiksha. By this predictor, you may get predicted information about the colleges you may get.
https://www.shiksha.com/b-tech/resources/tnea-college-predictor

You should clear your compartment first before seeking admission into any college. If you want to get admission without waiting for a year, then your admission could be possible if you pursue BCA from a tier 2 or 3 college.

Commerce stream is a good option to opt for interior designing in future. There is no restriction at all to pursue it. It is a demanding course nowadays.

Geo physics is the most influential course in India these days and also, it has the widest network to work with.
Therefore, in my opinion, geophysics is good to opt, if you are interested to pursue.

Eligibility criteria for B.Sc computer science varies from university to university. Most of the universities conduct entrance test of their own and according to the marks obtained in those entrance tests, students are selected.

Yes, this score is quite sufficient to get the admission. You may register online and apply. You don’t have to pay for choosing the number of courses. Wait for the cutoff of the colleges.

You will not be able to do it from any known government organization most probably, but you can do it from other colleges. Let us know the place you belong to or you wish to pursue your M.Sc from.

You may check this link:
https://www.shiksha.com/engineering/food-technology-chp