Family visa queries????????

Probation period follows the contract agreed and signed between you and your employer. It's governed by the saudi labor law of course; but that's the only relation it has with the law. In simpler words: yes, you can go for the family visa after right after getting your iqama.

I've seen other post of yours where you've told about your discontent with your employer. Your best bet would be to wait and see yet.

Yes, family visas are processed during the Hajj season but do expect extreme slow processing speed and huge delays on both places (here in KSA and embassy/consulate back home).