Need a siphon or pump to bleed inverter

The next thing would be the rule in/out that the pump is faulty by applying power directly to the power input positive and negative on the pump and seeing if it runs then.

 

It is hard to tell because you blocked the view with your hand but it does not look like you opened the valve nearly enough. I also do not hear any pump noise, but your camera could just be too far away.

Looking back at your previous post you need to do more than look at the reservoir. You need the touch the pump with your hand and see if you can feel it vibrating. Using a mechanic's stethoscope (or a long screwdriver or dowel to improvise one) would be better. Then you can hear if the pump is working.

 

Good catch @dolj It needs to be in Ig-on (2 button pushes foot off brake). Not accessory mode as I said. But the video I linked did show this if you watched you would know this. But good lookin' out Dolj.

 

You can actually drive it like that if you go slowly. (After closing the bleeder valve, of course.)

Where in Florida are you? If you can get it to Tampa Hybrids, it’ll be a TON cheaper than a Toyota dealer. (Disclaimer: I work there part time, but only because I like the shop so much that I’ve bought six cars there and, when they were short handed and offered me a job, I said I’d come in a couple days a week.)

 

Unless you are going to get a minimum set of tools and the required knowledge to use them, you are not going to be able to do very much work yourself.

A stethoscope can be improvised by simply getting a ~20" length of ⅜ dowel (or something metal would be better) and touching one end of it to the pump and the other end to your ear.

You are also less likely to get help if you are not willing to do what it takes to follow the advice. Nothing you've been asked to do is particularly hard.

 

Sometimes it's just as easy to disprove a component as to find the actual culprit through process of elimination and this is a valid diagnostic approach. How about just removing the bleed valve entirely? Just yank that sucker out and see if you get flow. Even with Ig-on it isn't that much pressure that you can't screw it right back in if you get good flow. If you now get flow, screw the valve back in and find something, pencil eraser or something that will block excessive fluid leak when you remove the valve. Then blow through the valve. If it's clogged get a small wire strand or something to rooter it open.

If coolant doesn't flow with the valve removed then you need to look elsewhere. At least you'll know not to question the bleed valve and we can move on from that.

Buy a large drip pan for your local auto parts store. The one I bought 10 years ago is 4'x3', cost $10.99 and is very handy for many of the maintenance and repair jobs I do. But it's not a necessity if you don't mind cleaning after.

 

The good news is the problem is fixed. The Prius is a strange beast and sometimes it's better to go to a hybrid specialist shop or the dealer that's seen this issue 100 times before. But the problems behind you now and that's the important thing so you can enjoy your Prius.