Which I-94 is valid?

You can use the last status which CIS gave you, in this case the H-1 until Oct 2016. It is called the last action rule.

My I-20 was cancelled by my old school prior to transferring to the school. This happened after my H1-B petition was approved.

If you have an approved petition and change of status valid on Oct 1 I would not do anything at all. Once you are in H-1 status any time out of...

Question on DS160 form

He must answer the question as it is asked. It does not ask if they are getting along. It is important to answer questions the way they are...

You also have a thirty day grace period after the DS-2019 expires so you should be fine. The visa does not matter.

If I've been granted my deferred action and have TX ID, SS, and work permit can I travel to south padre island and come back?

With those documents you should not have a problem traveling but be careful since S. Padre is very close to the border.

What is k1 visa

the K-1 is a visa category for fiancés of US citizens. It is only available if the fiancé is out of the US.

Which AOS form do I need to fill out? How long does it take?

I am afraid you are confusing the two options. AOS is available primarily for those who entered legally so it probably does not apply to your...

Can my brother search for job on a visiting visa

Yes, you can search for and apply for jobs while visiting the US.

I have an approved H1b. An amendment is being filed. If this gets rejected, will it effect my current approved H1B status?

Why in the world would it be denied? And, no, it will not impact your current case although that is not guaranteed of course.

Do i have to be responsible financially for my relative if i filed an affidavit of support?

Possibly. Before this goes too far you need to see a qualified immigration attorney immediately.