Anything protected by copyright requires permission for most uses. In the US, this means anything 1989 to present, and many things 1923-1989 (although research is usually required to determine the status of these materials).
No. Public domain means that the material is available for use by anyone, without copyright restriction.
Contact the copyright holder and request permission.
copyright - means that you do not have permission to copy the material without first obtaining permission from the author and paying them royalties to use their copyrighted material under licence. A trademark is usually a company Logo, or sometimes a slogan either. like Nike's trademark would be the swoosh symbol for example.
No, you cannot legally copy a small portion of copyrighted material for commercial use without obtaining proper permission or a license from the copyright holder. Copyright law protects the exclusive rights of the copyright owner and using someone else's work without permission can result in legal consequences for copyright infringement.
You would be guilty of copyright infringement, a federal crime.
Ask the copyright holder for permission.
"Vintage" is an ambiguous term. If by vintage you mean prior to 1923 then in most cases the material will reside in the public domain. However if the material is more recent you will have to determine who the holder of copyright is, and then contact them for the proper permission.
Infringement is the use, without permission, of copyrighted material that does not fall under a "fair use" or other exception to copyright law,
Yes. You are willfully duplicating a protected work without the permission of the copyright holder.
Use only original material, materials in the public domain, or materials for which you have permission from the copyright holder.
Usually a statement to the effect..."Material copyright 2009 by Mr/Ms XXXXX used by permission."will be sufficient.
Your original works, on your Wordpress blog, are automatically protected by copyright. Using others' copyright-protected works on your Wordpress blog requires an exemption in the law or permission from the copyright holder.