General Nonimmigrant Visa

My Project with My Client will end soon and my employer doesn't have any further projects and asking me to go back to my home country (India) by end of this month. My Visa is valid till Aug 2017 with extension filed. So I am considering to resign on last day of the assignment. ( no new employer found yet).<br>
1) as per new Rule would I be getting the grace period till my I 94 expires i.e till Aug 2017? Is this correct? ( 60 days grace period rule) Also during this Grace period Can I apply for a Change of Status to another non immigrant Visa - F1? (change to a different nonimmigrant classification.) if yes and F1 filed after termination of employment, will this not be considered as timely filed which can result in problems in the future?<br>
2) if F1 is filed Should I start my classes before I94 expiry date or can I Start in September or should I wait till F1 is approved ( after 90 days from date of filing F1)?

Recently I got Consular visa, that my I-797 was approved without I-94 so I need to step out of the country to get H-1B visa stamped.
Got laid off from EMP A and took around 55 days for EMP B to file h-1 and now I’m with EMP C. Both I-797's from EMP B and EMP C, I got consular visa to step out for visa stamping.<br>
1. Usually, how much time I have to step out of US for stamping, if I go little after 3-4 weeks what’s the valid reason that I can give to Visa officer at interview time.<br>

2. How can I justify myself about the 55days of gap I have from EMP A to EMP B ( during the time I do not have H-1B status), my attorney suggested that I need to tell VO that “I was looking for a Job and my employer took time to file for H-1B “. I’m not sure whether I can say this. Can you suggest a valid reason to give VO.<br>

3. MY GC Perm Labor has approved and EMP C has applied for I-140 recently and it's still in processing status, during this situation If I get a full-time opportunity can I move with a new employer? OR I have to stay with current one until I get I-140 approved and then transfer with a new employer.

I have a question regarding the 6-year stay on H1B if someone was in the US on L1B & later H1B. When does the clock gets reset, does it has to be 1-year stay out of USA at the time of H1B application filing OR 1 year stay out of USA between exit & re-entry in the USA?

I got H1B approval from company 'A' till Oct 2015, filed H1B extension in May 2015. As there were no updates, changed extension regular case to premium and got RFE in 2016.Before responding to RFE got to know that company 'A' has some issues and no one was responding from company 'A'. So before 240 days completion of I-94 got visa transfer with company 'B' in a premium process. Now my H1b is in security check with company B. My Both H1b cases/receipts are still in pending status. I applied for H4 visa now within the USA and if any of my H1B cases get declined. Can I stay on my H4 visa receipt?

In 2014, My wife was working with employer "A" on L2 EAD and the employer "A" filed H1B petition in April-2014. She got approval notice in May-2014 but due to some family reasons we have to go back to India and she continues working for the same employer from India since then. Her approved H1B petition with the same employer "A" is valid till Aug-2017 and H1B visa is stamped in Dec-2016 for the same employer "A". She never traveled to the USA on that H1B visa as her employer does not have any opportunity there. Since she never traveled to the USA on her H1B visa ever, does that mean she has never granted status as an H1B Non-immigrant?