You got good point minimos.
Well, almost all the links and procedure is correct as given in First post but I did some mistakes as I am new to this thing. I was unaware of the command inputs. Anyways, I made few changes to the commands mentioned in the first post.

I only gave the command for Restore Operating System like
instead of "flasher -f -F main.bin" I gave
"flasher -f main.bin -F -R".

Also, this was not mentioned in the first post. After downloading the main and emmc files, we have to copy these files in the "C:\Program Files\Nokia\Flasher". I didnt knew this and that's why the flasher was not opening.

Hope this will help others to get their devices back alive.