I have a friend who flips cars for a hobby. He said he flipped a Prius with close to 300K miles on it that was throwing battery troublecodes. He ended up buying two used battery cells (modules) on eBay for $50 (?) each and then installed them into the existing battery. He cleaned all the connections and then tightened every thing up and the battery troublecodes went away. The car regained it's acceleration and the fuel economy returned to normal. Study up on the repair if you ever do it. 62 volts DC is where DC begins to shock you so you'd need to be careful and wear some safety gear. You can't turn a battery off at that level. I've worked on DC equipment (forklifts and such). Not a big deal.
I don't think you'll have any troubles through. Its a Toyota. I have several friends with Toyota hybrids (Prius and 1 Camry). None have had any hybrid drive problems whatsoever aside from the car flipping friend who got his car cheap b/c it needed repairs. One of the Toyota owners had a stereo fail early on during the warranty period.
Back to the diesels: I don't get upset about VW diesel and their polluting tendencies. Either get the updates or not, I don't care. I can ride y'all around town and show you all the domestic pickup trucks with the fuel turned up belching smoke, the commercial delivery trucks, the construction equipment belching soot, the tractors out on the farms belching smoke, and the train that toddles through town that belches a little smoke. OH and the big highway trucks rolling past on the interstate that smoke a little too under certain conditions.
I think those big engines are many, many magnitudes worse than anything a little 2.0 liter VW engine makes. What VW did was wrong and they deserved every penalty they were dished. Those cars can be updated to make them pollute less or just wear them out and in another few years, many of them will be recycled. Life goes on.
That diesel Sportwagen was very high on our list but we chose something larger as we needed more of a do everything vehicle which meant a bit more room, AWD, a little more highway comfort. What we chose should last us another decade or more. Maybe by then we can transition to something similar with electric vs gas drive and more ability to drive itself safely. I'd love to buy a Chevy Bolt as a second car but we barely need a second car at this point. Our "nice car" will be the second car while we wear out our old car - now repaired. Cheaper per mile, full depreciated and then some, I don't worry about it, etc.