Check the Swedish Migration Agency website:
Swedish Migration Agency website

If you apply online, you attach the documents electronically. If you apply on a paper form, you have to bring all the requisite documents with you to the Embassy, together with the completed form.

You need:

• An application form (if you are not applying online). There are different forms for different types of work permits (see link below).
• Copies of the pages in your passport that show your personal data, period of validity and whether you have permission to live in a country other than your country of origin.
• The offer of employment, a union statement of opinion, and any other documents you may have received from your employer.
• A passport sized photo in color

Accompanying family

If your family is accompanying you to Sweden, you can apply on their behalf in your own application.

If you use a paper form, or if the family will be applying at a later date, the family members are to use form no. 133011, Application for a permit for family members of employees, visiting researchers, athletes and self-employed persons.

Check on the Swedish Migration Agency website which documents you need to attach for your family.
Swedish Migration Agency website