I filled out form I-130 and forgot to put the expiration date of my spouse's I 94 card the expiration date was D/S

You should be fine. You still should consider consulting with an attorney to prepare you for your interview if you are worried about details such...

I m on 2 and my wife is on 1 . I want to apply for 2 visa while in US . Can I travel to Canada while my 2 is under process ?

You are on a 2 visa? What are you referring to?

I AM A PERMANENT RESIDENT OF THE UNITED STATES, AND I WOULD LIKE TO KNOW WHAT CAN I DO TO HELP MY GIRLFRIEND AND SON?

I agree with my colleague. You need to become a citizen of the United States first. Consult with an experienced immigration attorney as per which...

What dose it mean when the court status says closed and waived of court

Is he in removal proceedings?

Generally there is no grace period.

Applying for citizenship after receiving permanent greencard?

I agree with my collagues. You should apply now. It will force USCIS to adjudicate to I-751.

My wife is not signing on form I-751. What should I do?

You need to file a Waiver. A waiver or an I-360 petition is the only way out. Waivers are very complicated. I would suggest you seek the advice...

Do I need to fill out Affidavit of Support?

I agree with my colleague .

H1b visa question

100%

Can my husband get green card?

On what basis did you file for your green card? In other words - how did you get it?