Are emulators legal to use?

You might be assuming that it will function correctly too. Not so sure. Regards to IP laws, it's a grey area, but as a personal use user your risk...

What should I do before I upload my app to Mobile Stores?

The odds that a patent will add value or be economically viable for an app these days are probably pretty slim, but always worth have that...

Do I absolutely give up my ability to receive compensation in for instance a licensing deal according to the clause attached?

As noted, the whole agreement would need to be reviewed. I agree with some others that it appears you have entered into a work-for-hire transaction...

There are a number of things to consider here and of course we don't have all the details to address it. But sure it is possible that you can...

I wanted to know if I can sell canvases with monopoly man, ferrari cars and etc printed online?

These kinds of questions can't be addressed in the abstract. It would be a case by case basis. You should familiarize yourself with the doctrine of...

It really depends on the context. You are free to use another's trademark descriptively in text to refer to that mark holder. This is called...

With a small budget, would it be smarter to apply for a trademark with the USPTO since a comprehensive search isn't guaranteed?

The USPTO does not search common law. That's the biggest issue. The USPTO Examiner also will not be searching with an eye towards your interests...

Paypal was limited because of Infringement of intellectual property. Can I solve this problem?

There is no "one way" to approach this. I suggest that you consult with a lawyer in private and discuss your best course of action in more...

Trademark law does "first use" apply after owner passes away?

There are far too many moving parts here for us to be of any help over this simple Q&A platform. I suggest that you consult with a lawyer in...

What if my nickname sounded like a companies name but it does not relate to the company what so ever?

You can call yourself whatever you want provided that is not likely to cause any market confusion if you are also using the name as a trademark...