Can I publish informative tutorials / guides about how to stream movies / series / TV Channels for free?

It would largely depend on exactly what kind of content you provide and in what context. If everything you disseminate expressly instructs viewers...

They accused me of copy right infringement because of a similar domain name.They want me transfer domain to them? Is this legal?

You really need a proper legal consult on this. I think they are alleging trademark infringement here. I suggest that you consult with a lawyer...

Could that be a problem? Yes, of course. Before you invest in any trademark make sure you get some legal guidance upfront. It is of course best...

Can i use a name of a blog that the last post was in December 2016 as my business name without being scared of a lawsuit?

We really can'y address this here. Before you invest in any trademark make sure you get some legal guidance upfront. It is of course best...

I think here the issue is more about copyright protection for fictional characters than trademark, but there may be some overlap. As a general...

Do I need seperate trademark protection for promotional materials?

I have a registered trademark for "Lantern Legal Services." If I wanted to put my name and logo on hats and pens for promotional purposes this does...

Can I link a textbook PDF (that I found online) on my blog if it's all for free?

Linking is not a problem. That is the digital equivalent of pointing to the content. You are not copying it, or distributing the content by merely...

Complaint filed after removing yourself from LLC, citing prior copyright infringement

Yes, in most cases you will be held personally liable for the infringement because that is considered a personal tort action. If you are not named...

Can you trademark a business name with a person's name in it?

What you described here, would likely not qualify for registration, but in general one can register a trademark that contains their own name. In...

Consideration for a trademark of a "generic" saying in a certain class?

Before you invest in any trademark make sure you get some legal guidance upfront. It is of course best practice to clear it before you start using...