Teaching & Education

No, it is not a government college.

For eligibility, refer to the link: http://cbsenet.nic.in/CMS/Public/View.aspx?page=80

For information about TSPSC eligibility criteria for TGT and PGT exams, please refer to the following link:
http://govtjobsdata.com/tspsc-gurukul-teacher-eligibility-criteria/

Well, in order to pursue career in teaching one needs BA B.Ed as basic qualification. MA comes after that. hence the comparison cannot happen between MA & B.Ed.

Yes, you can provided you manage time and ofcourse cope up with both the courses. There are many colleges which offer evening classes for B.Ed.

Eligibility to get admission in B.ed Course:
For getting admission in B.ed, you will have to qualify entrance test and need to have 50% in graduation.
As a B.Com fresher you can get job in the following sectors:-
BANKING.
RETAIL.
IT.
FMCG.
STOCK EXCHANGE.
MANAGEMENT.
ACCOUNTING.
FINANCIAL SECTORS.

By taking science field and dropping biology, you may pursued for B.Sc mathematics and then MSC mathematics.
Salary doesn't matter, you get to teach maths with lot of opportunities.
Also, you have to do B.Ed for profession.

Yes, you can. After completing BCA, you can take admission in B.Ed. Along with B.Ed, you have to clear the CTET exam.

Most of the institutions require the candidate to have secured a minimum of 50% in graduation. One can also join B.Ed after doing Master's degree.