Will i be getting 3 years extension on my H1 B(After 6 years) if my I-140 was with drawn by the previous employer.

If the 140 was withdrawn before being approved, you cannot use the petition.

Can I apply for my GC? Am I Convicted for immigration purpose? Can I ask the DA's office to correct the statute ?

You should talk with a local attorney or the attorney who helped you negotiate with the DA's office. Unfortunately, there is no trickery involved...

You need to calculate the time. Add all the time you were in the US. You are allowed 6 years.

How long should I be employed for I-134 affidavit of support? Annual salary for hourly paid employees.

You cannot create an annual income. You need to list what you made. However, in the cover you can submit and explanation and projected income.

Hi, I am Anil. I am holding valid H1B visa..but due to some reason couldnt fly to US. Can I apply in other company based on H1B.

You are quota exempt. Any other employer can sponsor you for a H1.

You should be fine.

My L1b is valid for 5 years, however it needs to be renewed after just 1 year. What does this process entail?

Depends on the petition type. You can check at the consulate website to see what their requirements are.

I applied for DACA and was approved but I am also able to get a U-Visa as well should I go ahead and apply? Or just wait 2 renew

I agree with my colleagues.

For DACA I need to proof that i've been living here in the US from June 2012 to present day?

I agree with my colleagues.

Based on senate immigration reform , what would be the best strategy for me to apply for Green Card (see my background)?

You may qualify for a EB1 petition as of now.