Banking, Finance & Insurance

Not really, because your MBA (finance) will anyway teach you all areas of banking and finance from scratch. There are some certification courses which you can try in 1st of year of MBA.

Yes you have a fair chance of getting admission in IMS. It would depend on your rank also for getting the admission.

https://googleweblight.com/i?u=https://www.shiksha.com/banking-finance-insurance/colleges/colleges-Mumbai&hl=en-IN
Please go to the link I am sharing. Here, you will get all information about colleges and list of colleges in Mumbai. Good luck.

https://www.shiksha.com/college/icicidirect-centre-for-financial-learning-delhi-jhandewalan-extension-34396/courses?uaf[]=et_dm&ts=54568471&rf=filters&bc[]=61&ed[]=et_21::dm_33
for details please visit this website

CFA institute does not provide any exemptions.

You can do MBA in banking and finance depending on your skills in that domain. If you are not used to numbers then you can go for MBA in any other area.

Your marks are deducted when the percentage calculated against the cut off released by DU because you are from Science background and didn't study any subject of B.Com. If you belong to general category, your chances are very low to get admit in this course. If you belong to the ST category, maybe you can get admission. But don't lose hope and wait till the last cutoff to come. You can check out last year's cutoff released by DU on their website.

Please visit this link for more details:
https://www.cfainstitute.org

It would be a good choice.
Eligibility criteria for CFA:
You should either have 4 years of graduation or 3 years of graduation and 1 year of experience. Whatever you do it Should be a compilation of 4 years. For more details, you can visit the CFA Institute website.

Yes, you can do it. Commerce graduates have good options as follows.
M.Sc. Finance
M.Sc. Corporate Finance
M.Sc. International Finance
M.Sc. Banking and Finance
M.Sc. International banking
All Masters programmes abroad are specialised programmes and focusing on a specific field. This will make you more employable.