New Owner of 2017 Prius 3, Maintenance history question

The car may be good but the dealership wasn't.

You probably have an owner who took their car to the dealership regularly and doesn't know very much about cars.
I would treat this car like it was owned by a 16-year-old kid who failed driving school and thinks that the Fast and Furious movies were documentaries - but that does not necessarily mean that the car was abused......just neglected.

Download and LOOK at the warranty and maintenance guide.
There's probably a lot of maintenance that will have to be done in the next 30,000 miles or so.
You can do this smart....or you can throw the keyfob at the dealership's "maintenance advisor" every now and then and hope that they will be gentle with you.
.....sounds like that's what the previous owner did.
If you got this car from the same dealership that made the entries in the service log, you may want to start seeing other people when it comes time to MAINTAIN the car.

Show them this thread.

......other than that????
Sounds like a fairly high mileage G4 that's at least had regular oil changes....which is DIFFERENT than oil CHECKs.

Drive it with confidence.....BUT...remember that you're car is about 40 in human years.
Lots of life left, but it's time to stop eating cheeseburgers and laying around the house.
THINK about regular maintenance and ask specific questions about the items listed in the Warranty and Maintenance Guide here in PC.

ANYTHING that is not specifically listed (other than perhaps transaxle flush) is not maintenance.....you're either getting ripped off or it's a REPAIR.
Repairs deserve research.....and second opinions.

Good Luck!
Let us know how it works out.


PICTURES.
(Or it never happened!)

 

That second one would be the engine coolant.
The dealer recommended them for profit most likely, but there is likely a mileage component to the coolant life.

 

Nice!

BTW....the dealer didn't "give" you those oil changes.
They want to see you in their service department.......

I would shorten the oil change interval on the back 9 to once every 5,000 miles.
I'd also review your warranty and maintenance guide to remove the question mark after the spark plug change.
Consider watching @NutzAboutBolts excellent maintenance vids.
You may not DO the work yourself, but it will give you a much clearer idea about what should be done.
Those vids are G3 specific IIRC but they 'rhyme' with your G4.....

Finally and most important.....ENJOY THE CAR!