Science

Being a Central University, The fee structure is very nominal. The B.Sc. (Hons) Chemistry fee is about Rs 7380 per year.

M.Sc. Microbiology is a 2 year advanced postgraduate course that combines the disciplines of Chemistry and Biology. M.Sc. Microbiology can be studied after completing graduation in the fields of Botany, Zoology Chemistry Physiology and Microbiology. M.Sc. Microbiology studies the relationship of Biology and Chemistry with the environment and its ecosystem. A minimum M.Sc. Microbiology eligibility is to have a B.Sc. Degree with a minimum of 50% or more from a recognised university to apply for the M.Sc. Microbiology course. M.Sc. Microbiology Fees varies from Rs 20k to Rs1L

After completion of B.Sc. You can apply for Railway exam through SCRA (Special Class Railway Apprentice) conducted by UPSC every year to join as technical officers in the Mechanical Department of Indian Railway. Further more, the posts you can apply are:
Station Master
Assistant Station master
Signal Controller
Railway Police Inspector
For this, you need to apply for RRB exam. The age 18-28 is mandatory and the percent score 60% for open and 55% for SC/ST is needed.

It directly depends on the college and their structure but according to me, the semester fees can be submitted in installments also and the fees for BSc is around INR 10,000 to INR 3.5 Lakhs and you can pay the per semester fees in installments, it all depends upon you.
Hope so you got your answer.

You don't really have to write 12th exam if you possess education qualification of 10+3yr Diploma+ UG degree from an valid University. And yes you can appear in government exam with your qualifications.

Most of the top College take admission on Entrance Basis or Merit basis. Students should have passed out 12th (10+2) with not less than 51% marks to be eligible for Entrance (the percentage may vary from college to college).

The minimum fee at ICAT Design And Media College for B.Sc. in Visual Effects is INR 2 lakhs to 5 lakhs.

The fee at Government Nursing College, Kota for B.Sc. in Nursing is 56,000 per year.