Waiver based cases may take longer for interview to be scheduled. Best to check processing times locally.

You may consider contacting the USCIS customer service for further information although this is fairly common.

Yes you may marry but this alone does not provide any benefits for which you can apply.

An adjudication before setting up a date for interview?

This likely means that your case is under processing.

May I extend my stay with B2 visa more than a year?

Yes you may file a second extension but your basis must be a strong one with evidence to support.

Can i bring my 2 minor children to USA before i get my citizenship? Iam a green card holder Is this will take longer time ?

Yes you may petition for your children as a LPR but best to consult with an experienced attorney for guidance.

You should indicate your status as retired.

How to fill out the I-134 if my sponsor is not furnishing with room and board?

Yes each sponsor should execute a separate form.

Please can my dad sponsor or petition to filled to bring my spouse in America since am not unemployed yet thank you

No you must file for your spouse to immigrate.

I'm filling out Form I-134. I'm retired, should I write that I'm self-employed as a retired or employed?

You should indicate your status as retired.