You probably wouldn't want to copyright a product; you might want to trademark it, or (if it's revolutionary) apply for a patent.
No; formal registration is not required for protection.
Your country's copyright office.
yes
yes
Registration is not required for protection. If you wish to register anyway, you may do so through Access Copyright at the link below.
Works are protected by copyright as soon as they are "fixed." If you wish to register a work with the copyright office, you may do so.
It depends what country you are in.
No, but you can register it as a trademark.
Registering a Copyright OnlineYes, you can. Go to this website: http://www.copyright.gov/forms/ which is the Electronic Copyright Office.
You cannot copyright a business name, but you can register it as a trademark.
Works are automatically protected once they are fixed, but you can register your art with the copyright office if you wish.
The songs are automatically protected by copyright as soon as they are fixed (written down or recorded), but if you wish to register them with the copyright office, yes, you can register a group of works under one application.