Need very urgent advise!!

Dear Experts, I am having some questions regarding various matters. I require your professional advise. 1.Suppose if I start a proprietership business and take a service tax registration in my own name and then later on if I start a company of my own then can I, by making myself director, transfer the service tax registration taken for my own to the newly formed company ?? 2. what is the maximum penalty faced for delay in tax audit for ay 2013-14? What are the charges thereof for conducting tax audit? 3. Can a person take a separate PAN for his sole proprietership business and have a current a/c for his business? 4. If a person is having a turnover of around 3 cr in his sole proprietership business, what will the problems faced by him if he keeps it sole proprietership/ converts it into partnership firm/ converts it into company ? (from the taxation point of view) Require your advise urgently!!