Backpacking on b1-b2 visa

You can stay for the duration the officer at customs gives you but you can apply for a 6 month extension

What are the tax implications of filing G-325a with USCIS and truthfully listing unauthorized work and no taxes paid?

Answer truthfully. there are no tax implications and unauthorized work is forgiven if marrying a US citizen. only the citizen needs to provide...

DS-260 Mistake. Critical or not?

Its not critical, you can explain at the interview.

My I-485 is on Testing and Interview stage now

It would be preferable to take a certified translator

Dream Act

You are not eligible. You would have had to have been here when deferred action was passed and resided here for at least 5 years

H1B renewal , does my employer need to file new LCA for me?

I would file a new LCA. It only takes 7 days to approve as your dates of employment will change

The filing fee is $420 for the I130 and $1070 for 485 765 and 131 if all filed together

My visa (b1-b2) has been stolen inside the us, I cant travel outside the us because I am in petition, can I get this visa in us?

No you cannot get the visa in the US and it is possible you will not get another visa as by filing an I130 you show an immigrant intent

I won DV-2014. My case # is 527xx. Approximately when I will be scheduled for an interview?

depends on where you are from and what numbers they are currently working on. Check the visa bulletin

Can my green card renewal be rejected for only an arrest record? the case was dropped. it was a misdeamor.

It is unlikely it will effect your case but include certified copies of the charge and dismissal.