2006 Prius HV battery and/or Brake actuator failure

I recently bought a 2006 Prius with 240k mi soon the brakes went out completely and a local mechanic said it was the HV battery, but I think there may be more than just that going on here. The car studders at acceleration from stop and often has to be turned off and restarted to restore acceleration presumably because of an inverter problem or something.

These were the codes:
C1391 ABS $29
C1310 ABS $29
C1259 ABS $29
C1256 ABS $29
C1252 ABS $29
C1241 ABS $29
C0200 ABS $29
B1650 SRS
P3000 HPCM
P0A10 HPCM
P0A09 HPCM
P0A08 HPCM, Mod $03
P0037 ECM, MOD $00
P3024 Mod $03

If anyone has experience with this combination, I'd be grateful for any idea where to start

 

I replaced the HV battery and will drive it this week so I can report which codes return. As an added bonus, I have no power brakes at all now. Happy Holidays!

 

So after replacing HV battery, brakes failed completely within 2 days. It may be the actuator, but I'm not sure because I have a breathalyzer on it and can't do any diagnostics until that is removed. This car was an expensive mistake.

 

My understanding is that I will need tech stream to bleed the actuator after I replace it, but how do I know which tech stream product I will need. I only have gen 2 priuses, but may buy newer ones once I can afford to in the future.... especially if I can get a plug in option for a reasonable price.