CA

Hey S.M.Haries,
Both the courses give you different field to work and scope of your career. If you go for BCA you will have more opportunities than B.Com as it will give you technical knowledge as well as candidature for most of the govt. sector jobs. However B.Com is a good course too if you are good at it you will fetch a job easily. Also effectiveness and career start also depends on the college you are studying. A few good college -

after completion of b.com you can try for MBA through cat,mat,xat,c-mat etc. but for this you have to qualify any one of these exams and you can do cs also along with b.com

It depends on individual's acedmic performance, personality and luck. For MBA institutes from which you pass out is a major factor on your first salary.

yes you are elgible.the only diffrence not having maths in 12 th is you will have to give more effort for statistics protion of CPT(Ca entrance).
But you are surely eligible.

You will have to first appear for the preliminary exam CPT after clearing CPT you will have to clear both the groups of IPCC the second stage. After the second stage there is a 3 year articleship after completing articleship the CA Final exam needs to be cleared for the degree