I am an 18 year old citizen still in school, i want my mom to become a resident in CA?

You can file for her when you turn 21.

Do I need to file I-102 if my current I-94 is not damaged but is attached to a damaged passport that will be replaced?

No.

I was asked for a i797 when I applied online to change my status from B2 to F2 ? It's my first time and never receive such form?

If you ever changed or extended status, your receipt is on a form I-797.

What can be done in order to get hold of my i131(AP) "lost" document/card, 3 months after case has been approved?

It could be lost, but until there is a decision, you won't know. Try contacting a senator's office.

My sister is pregnant to an illegal alien. What are her rights to child support, if any?

You can try to enforce the support order overseas. Might not be too easy. Might be very hard to prove paternity if he is not in the US.

Can my relative overstay her I-94 because she is waiting for her adjustment of status to be approved?

It depends on how you are related.

It is normal and it can take any amount of time, even years if the visa becomes unavailable.

IN US on a visitor visa and wanting to open a business & stay legally with wife

If you are on a visa waiver, you cannot extend your stay. You may be eligible for an investor visa, or treaty trader depending on your country of...

My mom was refused B2 visa. How do I help her to appeal/contest her visa denial?

There is no appeal from this type of decision. She can try again, with better evidence of her eligibility.

L1B Visa extension request at last minute impact my future visa?

You cannot apply for an L1b extension, the company must. If they do and you leave, the visa can be approved but your extension of status cannot. ...