Hi Vikki,
I have run into may people who have taken images that they have found on the web thinking that the web is "free" and made those images their own, without regard to the rights to those images. This indeed would be wrong.
Linking to other websites, as far as I know, does not violate any copyright, as long as you do not purport the material as your own (i.e. click here to see more of MY products ...)
Linking to other peoples images is not good. The images become part of your website and are perpetuated as something you authored. In addition, linking to images on another website will use bandwidth from another person's resources.
Copying text as well, word for word, without giving credit to the author and the source, thus making the content your own, would also be a violation.
In your case if you are using unique product names and designs that were created and authored by another party, this could be a violation.
Keep in mind that there are some exceptions to all rules and all rules have exceptions. These are VERY GENERAL guidelines.
The thing to remember is that nothing is free and free to use on the web unless it is explicitly stated so ... and even then you should be looking for the catch!
Good luck to you in your business endeavors!