Do I have to extend my O-1 visa before applying for I-485?

Extend your O-1 status since your I-485 has not been filed with your I-140.

How to get citizen?

If you entered legally and overstayed your visa, your wife can sponsor you for a green card. Once your conditional green card has become...

Can I petition my dad and my husband at the same time for u.s citizen?

In theory, yes. You will have to file affidavits of support for each of them or find a co=-sponsor if your income does not cover both.

How can I change my name as US permanent resident?

Wait until you apply for citizenship. To do so now might slow down the naturalization process.

How to go back to F2 status again once TPS ended?

Check your and your husband's I-94 status. if it says F-1 and F-2 and D/S, duration of status respectively for each of you, you should be OK.

This is not an immigration question. I am moving it to a more appropriate section.

My friend lives in Brazil and she is wanting to visit me in the USA on a visitor visa. I visited her there last week.

She will be expected to show strong family and job-related ties as well as how she will be supported while in the US AND strong nonimmigrant...

Is there any chance that an illegal immigrant minor can become a US citizen by being emancipated?

Emancipation will not help you get US citizenship. Best to work with DACA which, if passed into law, holds promise.

About n400 error at part 12 question no 44 a and b abouy selective services?

Mistakes happen. Bring proofs to your interview and explain pro-actively (do not wait to be asked) and things should work out.

I-539 filed for my dependents have been denied due to H1B transfer Denial. Company refiled it and it got approved.

I would refile the I-539s with proof of your H-1B approval so that your dates of authorized stay match.