Urgent - propritorship firm setting up formalities

I want to set up a Propritorship firm, i have the below mentioned queries :-

1) Can the firm name differ from the name of an individual (If the ans is yes then can it be named as ___ studio)

2) Do we need to obtain any licenses? (If yes, then from where to obtain the bussiness license for providing web designing services)

3) Is it essential to obtain Trademark registration number?

4) Can a bank account be opened in the name of the propritorship firm (Please list down the Documents to be submitted in this regard.)

5) Is there any mandatory requirement for a member of ICAI (Not having COP), to intimate the ICAI about carrying out a propritorship firm or any specific permission from ICAi is necessary? (If yes, then please provide the form or any other details which can be helpful)

Reply awaited. Thank you all in advance.