Singapore

To work as a CA in Singapore, following details will help you.
http://icai.org.sg/faq/

Right now Singapore does not give you settled own option even if you get a job. Look for options in Canada, NewZealand or Australia

BCom will restrict you job opportunities to Finance & Accounting only but BBA from a reputed college will give you more opportunities in different industries in different management functions.

I think Finance would be a good choice not only for Singapore but also in other areas. Banking can be the next best option Sagar.

Many business schools offer various courses in Singapore. You can apply directly and get admissions. No need of IELTS to apply. You also should no students are not allowed to do part time job in Singapore.
For NUS. and Govt university you need around 90% marks and have to apply well in advance.

you can do masters in Pharmacist or clinical pharmacy in Abroad which will make you employable in Singapore

Hi, James Lind offers a number of online professional courses in clinical research and allied healthcare. Majority of the programs are post graduate programs. It is better if you have already pursued a full time degree and trying to enhance your career through an online program. Hope it helps.

Hi, it is upto you. You must narrow down your choice basis the admission requirements, your own profile, budget, career prospects etc. You must also check the program structure, research opportunities etc before you decide. Hope it helps.

yes they will
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Do visit shiksha again.
Thanks,
Abhishek

Hi, TOEFL is not mandatory but for GRE requirements you must check the university websites as requirements differ.