How can I change my status due to marriage US Permanent Resident and how its long to have Work permit staying legally and green?

Unless you can maintain lawful status in the US while her green card petition is pending, you will need to wait outside the US and be interviewed...

USCIS resources are stretched thin due to COVID-19 and you can expect a longer wait than normal. Check the US State Department's Visa Bulletin...

Agree with my colleague. It depends upon your status in the US: US citizen, lawful permanent resident or undocumented? Consider a consultation.

Do I have to leave US if I get married to US Permanent Resident?

You must be in valid nonimmigrant status allowing duality of intent to remain in the US while your spouse's I-130 is pending. There may be other...

Is it illegal for a 13 to date and 15 almost 16? Hugging, holding hands, cuddling, kissing later on in the relationship.

Agree with colleague. Probably statutory rape and what a waste of your both your lives. Focus on school and your future.

Can a co sponsor be in another state, can he be a friend?

The co-sponsor does not need to be a relative or live in the same state, but does need to be a permanent US resident or citizen.

There is no requirement that the joint sponsor reside in-state.

I filed an I130 few years ago and omitted mentioning preparer will they allow me at the interview to add it ?

You can correct this at the interview. Omission as to the preparer should not be fatal.

This is not unusual. Go to the State department's Visa Bulletin found at...

DOES SEEKING CORRECTION BY AN ATTORNEY OF AN ERROR ON AN I130 PETITION BEFORE ADJUDICATION HELP IN ACCEPTING CORRECTION MORE?

It is impossible to say without knowing what the error was. Best to seek legal advice on this.