Is visa needed to drive through Canada?

You will need to ask a Canadian immigration attorney. A visa for the US does not mean you can travel to Canada.

Currently on F1 visa. Can change status to B2 while I130 pending?

You will be denied change of status to a tourist visa. If your priority date is near, use your OPT time and/or seek an employer willing to...

Selected as the best answer

What to do if renewal of DACA is not processed before it my work permit expires?

You are not authorized to work. Wait for your renewal.

Is it possible to get new H1 from I140 Approval copy?

Current US employer must file new I-140. You can retain the priority date of the first filing.

What steps must I take

You need to hire a deportation defense attorney. See:

F-1 visa while I-130 pending.

Go ahead and apply for the F-1, it may be granted even though there is a strong suspicion you are an intending immigrant.

Processing time

Always based on priority date. You are almost there. Remain patient.

Getting married to US Citizen, How will this reflect on my visa status ?

Once you get married, hire an attorney and apply for adjustment of status.

Can I call USCIS customer service without my employer or attorney to find out whether they received my h1b rfe response or not?

Technical answer is "no", since the employer is the one petitioning for you, but you can try.

Opt applied crossed 90 days timeframe what is my next step

See if the school can issue a new I-20 with a new start date and re-apply, change status, or leave the country.