Hi Vasanth, I don't know much about Metallurgy industry, but if you have previous GCC exp. in same filed & as you have mentioned a total of 8 yrs of exp.,
I think your pay scale should be somewhere between QR.12000 - 14000 as complete salary package without transportation expenses.
With such package, Transport has to be provided by company.

Housing & food expenses - on your side.

Other expenses you have already mentioned that company will provide you.

BUT MAKE SURE THAT THE COMPANY INCLUDES ALL THE BENEFITS IN YOUR FINAL & FORMAL EMPLOYMENT LETTER / JOB OFFER LETTER.
AS MANY COMPANIES IN QATAR VERBALLY SAY TOO MUCH & DON'T GIVE EVEN 50% OF PROMISED IN WRITTEN !! TO BE CAREFUL IN THIS. AND ALWAYS ASK FOR DETAILED OFFER LETTER. IT'S YOUR RIGHT