Entering US on a B1 visa after completing 6 years on L1and H1.

Temporary/brief trips will not break the continuity. Unless you are utilizing B-1 in lieu of H-1. However you need to actually stay outside for...

L1B to L1A Conversion

Your questions makes me think that you are missing several things. You need to sit down with your attorney and talk. There are several...

I am on an F1 visa do i need a Visa to get into Canada?

Yes, under automatic re-validation. Restrictions apply. Please read: http://travel.state.gov/content/visas/english/general/automatic-revalidation.html

If have applied for H1 (masters regular) . Can I check if I have been picked up by checking if the SEVIS number associated with

No. SEVIS record will not change automatically. H-1B takes effect from October 1 if approved.

Travel over seas on conditional green card while divorce is pending?

You can travel for validity of green card. If the question comes up, you must answer truthfully - weather you are together or separated. However...

Visa overstayer

In adjustments through marriage to a US Citizen, overstay is not an issue, provided you entered legally and there are no other issues.

Has H1B visa ... would like to bring my family on H4 (dependents) visa... Whether I need to go home country to be get their H4?

I disagree. When principal applicant's visa stamp is expired, Indian consulates "sometimes" refuse to give dependents visa, until the principal...

Will I get a receipt notice even if my application is not picked up in lottery?

If you are not picked, your employer/attorney will not get any receipt notice. Petition along with filing fee will be returned to employer/attorney.

Which are my options

Were you arrested in USA? You have to speak with your criminal defense attorney and try obtaining a disposition certificate.

You have to meet the required residency requirements. Best to check with your DSO.