Shares off market transactions

Hello,

I have follwoing questions:

1)       Once I get the Physical shares via Share Transfer Form, Can I than do an off market transaction to unrelated party and transfer my shares of public limited company to the new person?  

2)      If I transfer my shares (as (1)) above for a price, would it be legal to sell shares offline for a price that is above or below the price on exchanges without going through broker?

3)       Which regulatory bodies do I need to update (if any) for such off market transactions that I enter into for a financial gain?

4)      What restriction applies for secondary market trading if I want to invest in PRIVATE LIMITED COMPANIES (Not publicly listed or not public limited with RoC) which are backed by PRIVATE VENTURE FUNDS?

5)      Do I have to check if the facilitator e.g., Mumbai Angels or similar forum who facilitates such transactions (as (4)) is registered as a broker or not with SEBI? 

Kindly answer my doubts. Answer even if you know any one of the question answer.

Thanks,

Bhaumik