So the basic list of things you are going to need:
Gas Side:
Using some jubilee clips or hose clamps you can attach the pipe to the regulator and then the regulator to your QD. You can then attach the QD to your keg.
So in the example product you have linked earlier this would go on the angled post and provide CO2 at the pressure your regulator is set to
Storage:
The mini keg you linked to looked nice and would work well with the top to add the relevant QDs.
I personally use full size corny kegs like this one, they hold 5 gallons, but I have a dedicated freezer with a temperature controller that I keep my kegs in. They come in either ball lock or pin lock, the linked one is ball lock to match the QDs mentioned.
Liquid Side:
or
You could always go whole hog and build yourself a keezer / keggerator or a bar and then use taps with full shanks like this one, but its really all the same just a valve at the end of a pipe.
Again you would want to use jubilee clips or hose clamps to hold the pipe to the QD and the tap of your choice but that is really all there is to it, open the tap and liquid comes out (assuming their is pressure to push it) close the tap and it stops.
So in the example product you have linked earlier this would go on the vertical post and allow liquid to leave the keg.
I would just note that I have not checked the reviews of any of those products or who their supplier is, I did avoid anything that looked really bad but I am in the UK so I just went along with most of what I saw.
I put a deposit on my CO2 tank from a local supplier and take it back there to swap it for a full one every time it runs out, just paying for the CO2 when I do that.
I’ve traveled from Texas to California with kegs and set them up successfully and everyone has enjoyed the brew. I have traveled from my house in Fort Worth to the Cowboys stadium to tailgate and we’ve successfully enjoyed the brew. The secret is keeping it as cold as possible. I stored the kegs in what would typically be a kitchen trash can and put lots of salt with the ice(and small amount of water) to make sure the temperature is as low as possible. The lower the temperature the better the co2 stays in your beer. I have a portable co2 gauge and use cartridges which I’ll post in an edit since I’m on mobile right now but if I’m staying local enough I just travel with my 5# tank and gauges.
Edit: This is the gauge I have
This is the tap that you'd want to use
These are the tanks that you'd use
Sure it's a bit pricey, but, it's portable and that's the point.
Mine were always done with 5 gallon kegs too. I do have a 1.5 gallon keg and this is it if you're interested but again, I've only done what you're talking about with 5 gallon kegs, but, that doesn't really change anything.