My dear first you are welcome to Qatar. I think your company can help for this purpose good companies can provide visit visa for your family from begining. If your company does not help better to leave them in Pakistan as long as your R.P. is completed then you can put up application for your family visa and within a week you will get family visa. If you have UK driving licience you will be issued Qatar licience directly on that base. As you are coming as resident for job you should not drive car unless you get Qatar driving licience.
With best wishes