For Family visa
1) at least QR 10,000/- per month salary
2) six months' bank statement signed and sealed/stamped by the bank
3) rent agreement duly attested by muncipility (muncipilty shall require another set of documents like copy of title, copy of owner QID, lay out, etc. for stamping)
4) marriage certificate attested by your country embassy and ministry of foreign affairs
5) child's birth certificate attested by your country embassy and ministry of foreign affairs
6) educational degree attested by your country embassy and ministry of foreign affairs
7) copy of passports of your wife and kids
8) copy of your RP
9) NOC/salary certificate from your employer

Apologies if missed anything.

for profession no idea. check with your mandoob or go to gate 4 at ministry of foreign affairs Gharafa

go to the photostat/typing services shops at petrol pump near ministry of foreign affairs. They shall guide properly.

May Allah be with you.

Regards