Only US citizens can sponsor their parents to the US.
yes, you have to file form I-130 petition for alien relative ($355) and then you have to file form I-485 ($1,010) when she comes to the US.
How do you sponsor a person coming from another country to the US
Yeah, sure, as long as he uses a condom.
An immigrant can get another sponsor if the sponsor if the immigrant is on H1B. But the new sponsor need to file a new H1B for the immigrant.
You cannot sponsor someone who is already here illegally. You CAN sponsor them if they go home and apply for entry with a sponsor who will provide a home and/or a job.
The US citizen can sponsor his wife for a green card, not for US citizenship. Since he is currently unemployed, he will need to get a joint sponsor to complete an affidavit of support for his wife.
Yes.
Not necessary since the child is a US citizen by birth. Before the child is 18 years of age you need to apply for US citizenship certificate using immigration Form N-600. If the question is referring to the PARENT of the US-born child getting a green card, then there is no special way to do this: you will have to wait until your child is 21, after which they can then sponsor you for a green card. Merely being the parent of a US Citizen does not automatically entitle one to a green card immediately (or automatically).
The process to get green card can be through marriage,employment or through relative and should be petitioned for by the US citizen or green card holder spouse, employer or US citizen relative or green card holder in US respectively. Depending on the availability of the visas under the category you apply the time period to get a green card changes.
No. Your sponsor must already be a U.S. resident so you, as a non-resident, cannot sponsor yourself. Think if you have any relatives, friends, or employers who you can ask to sponsor you!
Yes, and success often occurs, but not always. The Immigration process can be long, drawn out and very frustrating.