Add-on work with new engine coolant pump

It should have been pink if Toyota SLLC was used for the drain and fill of the engine loop and inverter loop.

Your oil consumption is still w/in specs: Owner's manual says : 1.1 qt./600 miles. But it is high compared to me, 1/2 quart between oil changes (158K miles).

Be prepared for these next repair items:

Catalytic Converter - high oil consumption rates lead to an early death.
HV Battery failure at some point in the future too. $1699.70 Conicelli Toyota, $1803.16 Camelback Toyota
Local dealers might beat or match Conicelli or Camelback's HV battery price, you have ask.
Post #24 Verified $1700 HV battery purchase and no Tax (out of state billing address): 07 Prius pulled p0a80 code "Replace Hybrid Battery" - What are my options? | Page 2 | PriusChat​

I would buy the parts online from Camelback Toyota (Phoenix, AZ); aftermarket part quality & fitment is all over the place.
Water Pump w/ gasket, yes, $55.33
Belt, yes, $14.99
Idler pulley bearing, optional, $49.59
Thermostat, yes, $19.23
Thermostat o-ring, parts diagram not clear if thermostat comes w/ this (call and verify w/ parts dept), $4.99
Coolant control valve, NO, $78.47; This will trigger DTC P1121 when it fails completely (CEL stays on) or works intermitently (CEL comes and goes on). This part failure will not leave you stranded. Some people report hearing a rhythmic noise (likely valve trying to get into the right position), or not having any cabin heat (valve is stuck in the wrong position, preventing hot engine coolant from going to the cabin heater core).

Inverter Water Pump, optional, $102.36;

When was your's replaced during the recall?
This part lasts a really long time. Read to get some perspective to decide if years/mileage is right for you to change: Inverter pump life? | PriusChat
You can change out parts preemptively for preventative maintenance if you want. Some change when the part fails.
DTC P0A93; many postings about this for you to read and be aware of what this part failure looks like.
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Toyota SLLC Coolant

2 gallons for engine loop (simple drain and fill; NO flushing that all shops want to sell.)
1 gallon for inverter loop (simple drain and fill).
$16.95/gal (before tax) for me. Price shop your dealers; they will price beat/match.
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Since you are inclined to want dealer service, you can browse dealer websites to see their service and parts coupons online. Dealers will match other dealers offers. Don't forget about Costco and AmEx. They have dealer service and parts discount programs.

 

Don’t need an endoscope which is a medical scope all you need is a flashlight and then bend over a little.
Just look in the area of the serpentine belt if you see one speck of dried up red coolant anywhere in there the pump is weeping. You want a $99 Borescope.

And the dealer doing anything reasonable is hard to come by. My dealer charges $145 an hour my mechanic charges $80. What’s your dealer hourly rate?

After owning my car for 11+ years the only thing my car noticed and it helped its mileage was replacing the inverter coolant. Very very easy. Engine coolant repkacement on the other hand is very difficult and i would not attempt to do that without some way of monitoring the engine coolant temp because it could have a massive airlock and you will never know till the RTOD pops up because the motor is severely overheated.
This is of course exacerbated because it’s the wife’s car as you will have no control once you hand it back
To her.
Everyone should own at least a Scangauge Xgauge. Very useful tool. Lifesaver when changing the coolant.

Also If you own a aged G2 Prius an obd code reader with techstream is a must because hilarity over your hybrid battery will soon be on the horizon.
There on sale on amazon VXDIAG $66 powered by techstream.

 

Water pump (failing) - Absolutely
Serpentine belt - Absolutely
Thermostat - Optional, the service life of modern thermostats is essentially "lifetime"
Idler pulley - Absolutely
Coolant control valve - Yes, but ONLY if routine cooling system maintenance has not been done per the TMC guidelines, as this is part can fail due to debris in the system left by old and degraded coolant.