Does website C own rights to A's content even though it's illegal to post/publish it? Or is the transfer of rights not available

This question can't be answered here. The best is a big "maybe." Any creative expression will be covered by copyright law automatically. Then...

Will I or my friend, the seller, run the risk of being sued by the company for using an image with their name in it?

The context really matters. In all likelihood, this will not become a problem, but it could be for the reasons already stated. In general, just...

US copyright law does not extend to fashion designs because we consider them functional items. This is why you see all the same dresses you saw on...

Can I legally list the companies and publish the drawings?

You are free to refer to real companies in your book so long as you are not making false statements or exercising a reckless disregard for the...

Would it be sufficient to print an agreement on a paper and get signatures or do we need some legally binding process?

I don't even know what "court issued stamp paper" is. What is more germane to your scenario is not whether the agreement in and of itself is...

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Is email ever a valid document to prove that permission was obtained to use a copyrighted work?

To chime in, the email can certainly be used to show asset to an agreement. But as noted, it may be more easily refuted although that is not easy...

How Do I get this Company accusing me of infringement to leave me alone?

You really need to explore all your best options with counsel. There is no "one-way" to approach this of course. I suggest that you consult...

NFL copy right

It sounds like you are describing trademark infringement. Odds are that nothing will happen because that is a very small matter compared to...

Are there intellectual property attorneys that will work on contingency?

IP legal issues and "no money" are incongruous. It will be a very rare case where an IP lawyer will work on a contingency. You see this in cases...

Can I imitate a logo and use it publicly for no commercial gain?

This is the second time you have asked this question yet I think every attorney has said the same thing. Forget about the trademark question for a...