In Bangalore, there is only one office for shops and commercial establishments. In the same office, there are many wards. If you approach the office, they will guide you about the ward number.
PTO Registration in Koramangala
Regarding PTO, I believe your Circle might be in Koramangala. You should try to register PT online and submit the supporting documents to the department. You should also scan and upload the supporting documents online.
Starting a Business
If you are planning to start your business, all the departments may object, but you can manage those objections.
Fees for Registration
For registration with shops and commercial establishments, the actual fee is around 250, and apart from that, there will be other expenditures of around 2000.
For the registration of PT, the fee is 2500, and the same amount of other expenditures apply.
Regards