How long you need to wait after 485 applied, to switch employer, so that you dont need to apply perm and i 140 again ..?

For a considerable time, preferably until all the applications are granted and you become a US citizen. If you "switch" employer, the old one may...

J1 to I485, PD current

As long as you maintain a valid status, you can adjust. As to the details, speak with your husband's attorney.

How long before I receive my J1 working visa am I able to travel to the United States

No, you should enter the country in the status you are planning to hold.

What is my present status now ?

Out of status /overstay

I am in Canada since 2011, green card was approved last month. My H1-B and AP expired last year. Can I use the G.C. to return?

I am a bit confused as to on what basis your green card was approved, and what exactly was approved. If it was I-130 that was approved, it is not a...

Will I be able to travel within the u.s with deferred action?

Yes!

Check with the DMV, but rule of thumb: you need to have an EAD to apply for license/ or valid status.

Can Cross Chargeability be used when spouse is on F1 visa?

Yes.

What should i do with new extended I94 after i left USA?

You will have a new visa and new status, J-1.

Hi ,I have applied for 2nd Masters and My F1 OPT (29 months) expires. Will i be in status ?

Grace period is a tricky thing. It's good if you would like to leave the country, but may have a different result if you are trying to use it for...