BCA

Hi, No there is no entrance test for BCA admission. It will be on merit basis, your class 12 marks it should be above 50 and you have maths in class 12. Regards.

You can refer the following link to get detailed information about some of the colleges in Varanasi that offers the course of BCA. https://www.shiksha.com/it-software/colleges/bca-colleges-varanasi

The chance is very low with that score and percentile, and it seems that may be you'll not get the chance of taking admission in FC, Pune. But, still you can make a try directly. If you don't get then there is many more colleges you can have.
https://www.shiksha.com/college/fergusson-college-fergusson-college-road-pune-25748
This link will give you a better idea about this college. Stay positive. All the best.

https://www.shiksha.com/bca-bachelor-of-computer-applications-chp
Refer to the above link for information about the admission procedure.

Yes you can apply for direct admission but only if your 10+2 percentage is more than 60.

BCA fees is Rs. 39,800/- per year

You can refer the following link to get detailed information about the admission process, fees structure of some of the top BCA colleges. https://www.shiksha.com/it-software/ranking/top-bca-colleges-in-india/96-2-0-0-0

Admission to the MCA programme in BIT is based on marks obtained by the candidates in MCA online Entrance Test conducted by the Institute. For more details please visit www.bitmesra.ac.in.

If you do it from university of Delhi, then your fee will be 30 to 40 thousand and if you do it from IP University, then your fee will be around INR. 2 to 3 Lacs.