You cannot. Names, title, and common words/phrases do not qualify for copyright protection.
Using copyright-free materials is much cheaper and easier than negotiating for a license with the copyright holder of a protected work.
Free of copyright restrictions (generally speaking).
Text is not copyright-free unless it was created or published so long ago that the copyright has expired, or if the text does not qualify as having sufficient "creative work of original authorship" to trigger any copyright protection.
Free of copyright restrictions (generally speaking).
Images in the public domain, such as NASA imagery, would be copyright-free. People often use "copyright-free" to describe the millions of images on Flickr that carry Creative Commons licenses, but this is technically incorrect. The images are still protected by copyright, they simply have extraordinarily broad licenses that allow many uses without further permission.
You can't copyright a name. "Where's Waldo?" however, is copyright!
Copyright protection is free and automatic, as soon as the work is fixed in a tangible medium.
In any country of the Berne Union (including the USA, Canada and all of Europe), copyright is completely free, instantaneous and automatic.
You cannot copyright a business name, but you can register it as a trademark.
A copyright is granted to the person that created it. A user name is not considered a proper identification of a person. You will have to use your legal name to register the copyright.
No. A name is a trademark as in a business . Copyright is a protection of written material. Your name is not written material.