1. For filing a petition under section 156(3), cr.p.c. you dont require a lawyer to file it, but you should know the procedures for filing the same so that it is not getting rejected or dismissed for want of proper evidence.
2. If that person behaves in an unruly and arrogant manner,. you may lodge a complaint with the police for hatching a conspiracy to defraud you by both, this person and the other fraudster.
3. For issuing the legal notice you have to get his address somehow through your own sources.
4. In the course of legal recovery, the expenses like court fee, incidental expenses in the police station, lawyer's fee may amount to more than the amount what you have already lost.
5. implead the company as a party to the case, they are answerable to court if they are impleaded as necessary party to the fraud case.
6. The money was transferred to the account holder's account hence he can be made liable for the amount received at his end.
7. Yes you can register the complaint on line too.
8. That would become too costly.