You should, and you had better hire a US attorney and an attorney in your own country to make sure you comply with the laws in both jurisdictions.

Hire a lawyer. He will figure out if you are liable and what to do about it.

Hire a lawyer. The issue is if you have enough contacts to justify long arm jurisdiction.

That depends of the Philippines. Ask their embassy or consulate.

Yes. You probably should set up an entity in Mexico, and of course will have to comply with al employment laws there. Hire a Mexican attorney....

This is an immigration law question, Pass to that area.

This is an employment law question. Hire an employment law attorney.

What papers? Sign what? Hire a family law layer to make sure you have the proper contracts that protect both of you.

You need to hire a business layer to properly set up your company, and an immigration lawyer to see if you can bring in people from India.

My advice is you hire an immigration lawyer and find out.