Am I considered illegal while my AOS ( I-485) case based on marriage is pending ?

I agree with the first answer posted here. It is unclear what your status was prior to doing the I-485. Your previous status would be the...

Do I need to attach affidavit of Support for filling I130 form for my sister?

You need to submit it after the I-130 is approved. You will receive follow-up instructions on how and when to file the I-864 Affidavit of Support.

Is it common for Immigration to not come pick up someone with a detainer placed on them?

I agree that ICE is very diligent when it comes to obtaining custody within the 48 hours. In most cases it's unlikely ICE will fail to act within...

Assuming he entered without inspection, there is a remote possibility his daughter could petition for him. However, he would have to go through...

Can an illegal immigrant get out of ice custody aplying for a workers permit?

I agree with the previous answer that there is not sufficient information here to give an accurate opinion on viable options. In general, if you...