These lights on the dashboard came on... HELP!!

If your 12v battery is 5 years old, I would say it is the 12v battery.

Replace it.



You have to load test the battery to get a better idea if the battery is on its last legs.


iPhone ?

 

Given the photos you provided, your car has a few issues:

1. The red icon in the top left corner of the MFD is the key indicator your car has a very serious issue. That icon means that the hybrid drivetrain has a problem. The problem could be the high voltage traction battery, or could be something else. The presence of the check engine light implies that the engine also has a problem. Also note that one of the brake warning lights ((!)) is on, but that may be related to the hybrid drivetrain problem.
2. If you want to figure the problems out yourself, you need to retrieve the diagnostic trouble codes. The best device for doing so is Mini VCI which requires use of an older laptop, either Windows XP or Windows 7, 32 bit OS.
3. The screen shot showing the 12V battery voltage was taken when the Prius is READY. That shows you that the DC/DC converter within the inverter is working properly. It is also important to see what the 12V battery voltage is when the car is not READY, because then you will be seeing the actual voltage produced by the battery. There are several posts about how to check the battery voltage at each of the various Prius operating modes. Of course, the easiest is to just use a decent digital multimeter for that purpose.
4. When your husband changed the engine oil, he apparently did not reset the MAINT REQD light. There are many posts about how to easily do that.
5. Besides MAINT REQD, which of those warning lights were on, prior to today?
6. The easiest place to obtain the correct 12V battery is at your local Toyota dealer. That will probably cost $200 or so from the parts counter, and the battery will have an 84 month pro-rated warranty. There are many posts about how to replace the battery, that is not a very difficult task if you have reasonable metric tools available. If your husband can change the engine oil then he probably can change the battery.

 

I would measure the voltage of the 12v battery first. Take it to a dealer to get the codes read. The traction battery may be under warranty. If not ask about goodwill from the dealer and Toyota.

 

Yes, there is a manual lever release which can be accessed by crawling into the hatch area, removing the folding hatch floor, and finding the little rectangular "door" located at the rear of the plastic storage tray over the spare tire. Open up that access and you will see a shiny lever which is the manual hatch lock release.

 

Your husband will have to manually crawl in the back of the trunk area and remove all of the plastic to get to the battery. I remember when my battery died, the trunk won't open since its electrically control, so I had to crawl to the trunk and remove all of the plastic trims to replace my battery. Let's hope there is a way to open the trunk, good luck

 

Since he has a good 12v battery why can't it be hooked up to the jump point under the hood?

 

It could be, if the OP's husband has jumper cables that fit the positive jump point.