Can I apply to have my family's status changed from Withholding of Removal to Permanent Residency?

I'm sorry I really don't understand your question can you please specify

How do I increase my chances of getting a visitor B1/B2 visa?

The only way to find out is to apply if you meet the requirements then you should be able to get the visa. There is a right or wrong answer

3years or 5 years

If your separated or divorced you must wait

I have a visitor visa to the U.S.A can I change it to a student visa when I get there, as I want to apply for university

Yes you can. But there will be a difference when you get I 20 in the us then an i20 when your back home

You should really consult with an immigration attorney and view what your different options are

Your ok calm down congratulations it seems like your case got approved and there sending you the green card. This happens quite often

Citizen Married to International student what should I do for her to get a resident statute

You get married then you file the family package petition. It's about 4-5 applications consult with an immigration attorney to help you with this

How long it takes to get my wife visa number im a green card holder..

Since you are a green card holder it will take about 2years

I filed a petition for my spouse. What does 201B INA SPOUSE OF USC means as the preference of classification.

That just means that your wife is an immediate relative of a United States citizen

ADJAESMENT OF B1/B2 VISA

If your brother files for you it can take 10 to 15 years