How long does it takes to get green card if a company sponsors?

It depends on the category they sponsor you in. A 1 can be 18 months a 2 can be close to that, and 3 can be 7 years.

I have applied for a visit visa to the US which was approved but the embassy has asked me to submit form I-275 which I dont have

If you do not have one or it was never given to you, thats what you need to explain to the embassy.

Petition for husband. i am a naturalized US citizen who wants to bring my husband to live with me in the states

Could be a problem. I would speak with an Attorney before you file to evaluate any potential problems.

My dad just entered us on b-2 visa for a few days, is there a waiting period before I can apply green card for him as a citizen.

You can but before you do, I suggest consulting with an Immigration Lawyer. These types of cases can be sticky especially since he just arrived...

Do I need to repay medicaid benefit as a sponsor?

You might have to but I would not pay anything unless asked to.

Can i still get the green card on the 6 months of ACD ,my interview next month & the 6 month didn't finish yet

Time to hire an attorney. You may have a serious problem.

Unwritten 30/60 rule

See my other answer above.

What is the unwritten 30/60 rule from uscis?

if you try to change your status within 30, presumption of a fraudulent entry. Wihtin 60 its a rebuttable presumption. Marriage to US Citizens...

Selected as the best answer

Restraining order

of course. Ownership not required. A lawyer can help or you can go to the family self help center to obtain some assistance.

International Adoption and Immigration

Visitors visa to visit. Anything else requires alot more.