Spare Tire

you could try ebay, or if there are any salvage yards nearby. there should be no shortage of junked prius. i don't think full size will fit, but i could be wrong.
you should be able to get all the part numbers and specs from a dealer parts department.
it's just a standard scissors jack, but you couldn't go wrong if you can find a descent aftermarket, the oem is pretty flimsy.
i hink you jack on the pinch weld under the rockers, it should be in your owners manual.

 

The tools and temp spare rim info:

Standard tool for Toyota Prius ZVW30L - Auto parts - Amayama

Disc wheel & wheel cap for Toyota Prius ZVW30L - Auto parts - Amayama

there’s also a plastic cradle, holds the tools and sits inside the spare rim. Dealership should at least be able to confirm what you need.

Temp spare tire size is specd in owners manual. If manual is missing pdf can be downloaded from Toyota Tech Info site.

I can pretty much guarantee a full size spare won’t fit.

 

I have a full size spare in my Prius.

 

I'd wager the hatch floor sits an inch or two higher.

 

What you see in the picture is how I have it, the trunk floor does not raise 1" and lays as it should.

 

With the black plastic sub-floor tray missing.

 

Yes as you see it without the black plastic sub-floor tray.

 

Size of aluminum wheel?
Tires?

 

It is a an OEM 15" and tire is 195/65R15

 

OP asked a simple question in post #2.

You shoehorned a full-size spare in there, which rides high both due to chafing the sidewall and the tire's increased width, and to compensate omitted underfloor tray and tool cradle, likely leaving the hatch floor unevenly supported.

I've tried dropping a full size tire/rim combo in there, know what happens.

 

at least we know it can be done if that satisfies your objective