Volume Control with 6 speakers:/

In-ceiling speakers?

A stereo system in a bedroom or office would be better.

4, family room?

2 for the kitchen

2 for the patio?

Depending on the speaker type, 70v PA style system. I'm pretty sure you can run it how ever you want. That part depends on what the source amplifier can do and is made for.  Certain amps are made for just this type of set up?

I suggest calling Parts Express and tell them what you have they will tell you exactly the type of speakers that will be best for you.. Options, ay?
They have 4-12 station amps, with YOUR phone in control. Weather proof drivers for outside.. Remote vs Hard wire vs both..

I'm not getting a clear picture.. Parts Express is your friend though..

A single receiver and 4 pairs of wires? Something like that..

Regards

Yeah it’s 8 in ceiling already wired up (no speakers yet) my question is can I run a volume control knob after my speaker selector then run the volume control knob to the receiver? I’ve got everything routed to a hall closet and a receiver that works with my smart hub and Alexa. So I can keep it all hidden. Let me see if I can add some pictures? Or can someone direct me on how to?

https://docs.google.com/document/d/1-1QD8R4rBbqkdZ6XMKFwPtzKLTRcXt7NRYT-xtOLu1A/edit

So black circle= speaker location
red filled circle=routed to location
the red X is where I want the volume knob in the wiring if it’ll work

70 volt transformers what oldhvymec said.  
As noted ceiling speakers don't sound too good unless you're laying down. Even then forget about an image.