Does anyone know how one is eligible to sponsor someone from a different country for them to have a visa?

That information should be readily available on the federal website of the country

Depends on the country but you need to be related atleast i would think

Nope. And I don't wanna know.

You have to make a certain amount of money, I know that. How much I'm not sure. I did it years ago and I needed to show my tax return
Essentially the idea is that you will support them so they won't become a burden on society.

Regulations vary from country to country so impossible to give a definitive answer - contact your countries Immigration Department.

You wanna offer me a green card?😂😂

What country?

Not for free