Interview Help: I need someone help me explained my tough situation about career changing from I.T to Finance/Investing

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Job Description

Let me briefly explain my situation here.
I am age 30 now and graduated from one of a very respectful university in Canada in Mathematics and Statistics in 2010. However, I am working in I.T. since graduated, which is not really my desirable job. IAnd now I am planning career changing from I.T to Finance/investing.

but obviously, i am lack of such finance/investing experiences. To compensate such experience issue and more finance/investing sounding, I took the widely respectful CFA level 1 exam, and I passed successfully. However, even passed such difficult exam, it is tough to explain my career switching during interview.

So now, in Odesk, i hope i can someone can help me to solve my situation and be able to help me write a script to perfectly answer some tough interviews like following:

Please introduce yourself.
It seems your previous job not directly related with finance/investing, what you are still interesting this job or why you like to change field?
What do you know about our company?
What do you know about this job?
What you response in your last job and what is your achievement?
Why do you interest in finance/Investing?
What is your strength and weakness?
What skills set you have that can make you success in this position?
Please convince me why I am not hiring a more experience person instead turning to you?
Do you want to know more question before we end this interview?
Do you know mandarin?
What do you like to do in your spare time?
How about your PC or excel skills?
Are you good with teammate?
How about you have arguments with your teammate or even your boss?
How you take criticism?
What is your expertise?
What salary you expecting?