Yup job is the best way to cover ur gaps u should not show any gap more than a 3 months of period,, for home ties a certificate from employer will certainly help u but u must show some property ur relatives etc, for wife u will require to add ur marriage certificate only and when u will fill the forms it will ask for require data no matter ruksati is done or not ur married by law,, so u must tell visa officer don't hide,,for specific pakistani students visa requiremts go to this link
http://www.canadavisa.com/canada-immigration-discussion-board/study-permit-requirements-for-pakistani-students-t173401.0.html