Just Purchased 2013 Prius Five in Rough Shape

welcome!

i would probably oem everything from a dealer due to the proliferation of counterfeit parts.

not sure you need coil packs at 125k. you've just hit the first big maintenance milestone. plugs are usually in pretty good shape, so no rush.
fluids definitely, but the egr circuit is the top priority soyou don't blow the head gasket.
all the best!

 

Your list looks good but I would add the following:

MAF cleaning
Bottle of redline fuel treatment
permatex rust treatment spray for rusted parts, make sure you wash undercarriage first using high-pressure washer.

 

Download the CARFAX Car Care app
You will find a lot more maintenance records other than the Toyota dealer.

Buy a Carista obd reader.

Download the Dr. Prius app.
You can determine the health of the hybrid battery and be able to turn off the reverse beep and seatbelt beep.

Download the Hybrid Assistant app.
With this app you can monitor the temps of the engine and the inverter and other data.

 

Trim 5 doesn’t have a sunroof.

 

I don’t think there’s aftermarket alternatives, nor an advantage if there was. Everything you have is eminently cleanable. The intake manifold PCV valve EGR valve are quite easy to clean. The EGR cooler takes more care and attention, but with your miles, 4~6 hour-long soaking sessions with oxi-clean solution, or similar but with lye solution, if heavily carbon-impacted, and you can have it all in like-new condition.

see top two links in my signature for more info. (On a phone turn it landscape to see signatures)

 

Did you get a good price for all your troubles? Good luck!

 

Ryan,
Welcome! Time depending on the EGR I understand....so pull an EGR cooler off another Prius from a junkyard and clean and soak that in Oxyclean per Mendel's link information. This will give you practice on removing it from the car (including the bolt you don't need to put back) and make you more familiar with the system. They you can always have a clean spare on hand. If you get great at it you could provide this service to others for a fee.( I know someone who does this and makes an extra $500 a month pocket money)
I would also spray down the radiator with a 50/50 mix of simple green and water. rinse gently and repeat.....Suspension is easy and you can do it as you save money. Rear is easier than the front. If you get the car up on stands you and lube the chassis points...and inspect the rocker panels. A new Hybrid battery will run $2-3K if you do it yourself. It is involved but I not difficult IMHO. I second Bisco on OEM Parts...lots of junk on Amazon....you might get lucky. I get mine through Olathe Toyota. they do mail order as well. I run the Autel OBD2 unit and Dr. Prius. App.

 

There are no aftermarket for these parts but a new cooler from Japan via ebay is cost effective.

You don't want the aftermarket egr valve - most will stick open right out of the box - the real failure mode of the egr system any dealer mechanic will tell you.

Big mistake

. You should make this a priority. If you lose or damage your fob it is far more expensive to get the system initialized and configured for new fobs.

Cooling system drain and fills every 50k with oem fluid is key for long hg life, even though the past is unknown and a hg job is almost guaranteed at this point.

The brake by wire "brake booster" and hybrid battery are very likely to be changed on your watch. These are not sudden failures so get a rainy day fund built up.

 

Your list is a way to spend a bunch of money in advance without gaining much protection from future failures.

Better just to keep your savings account fat- you're going to need it.

Exceptions: replace the coolant, that one is a good move, and get the 2nd key done. 125k is fair for changing the plugs but don't change coils- factory coils are much better than the replacements and most people never need them in the first place.

IF you decide that there's a problem with the water pump, replace it with a Toyota pump. Even the real-deal Toyota pump is implicated in some cooling system problems; the aftermarket ones are less good than that.