Prius (2004-09) :: Starts But Won't Go Into Drive Or Reverse

I have a 2005 Prius. 3 weeks ago my dash lit up with warning lights so I took it to the dealer. They ran a diag and came up with

P3000/123
P0A80/C2311

"Vehicle has bad #4 battery block. Neesd HV Battery pack and HV ECU" I had just hit 150,900 miles.

Given the cost I decided to fix it myself. After tracking down some cells and getting a HV ECU from a local junk yard I pulled out the hv battery broke it down, tested the two cells in the #4 block and replaced the low voltage cell. I then replaced the HV ECU. I put everything back together and everything started up fine and ran great.

Things work well for 2 weeks then yesterday as I'm pulling into my driveway the main error indicator (the big red triangle containing a !) lit up. Needless to say I was disappointing. I turned the car off and then turned it back on. At this point most all of the error indicators were lit (see attached image). I get a new error indicator on the multi-information display (the red car with the ! in it, according to the manual I'l supposed to take it the the dealer immediately) The car started but the engine does not start. The car will not go into drive or reverse, just neutral.

I thought I may not be pressing the brake correctly so I spent some time making sure I was depressing the brake pedal fully when starting up. No change. I checked that the break lights are working when I press the pedal and they are working correctly. I checked the brake fluid reservoir and it is filled to the correct levels.

A friend bought a innova OBD2 scan tool (his kid's cars break a lot) I borrowed it and hooked it up to my car. No error codes detected was what it told me. I was a bit perplexed. I switched to the Toyota enhanced DTC and then Readiness DTC and finally found some codes:

P0300
P0171
P0172
P000A

I found what looks to be the 2004 service manual online in an open directory : [URL] ...... While I don't find P000A I do see the other 3.

P0300 (05–157)
Random/Multiple Cylinder Misfire Detected

Open or short in engine wire harness
Connector connection
Vacuum hose connection
Ignition system
Injector
Fuel pressure
Mass air flow meter
Engine coolant temperature sensor
Compression pressure
Valve clearance
Valve timing
PCV hose connection
PCV hose
ECM

P0171 (05–143)
System Too Lean (Bank 1)

Air induction system
Injector has blockage
Mass air flow meter
Engine coolant temperature sensor
Fuel pressure
Gas leakage in exhaust system
Open or short in A/F sensor (bank 1 sensor 1) circuit
A/F sensor (bank 1 sensor 1)
A/F sensor heater (bank 1 sensor 1)
EFI M relay (integration relay)
PCV valve and hose
PCV hose connection
ECM

P0172 (05–143)
System Too Rich (Bank 1)

Injector has leakage or blockage
Mass air flow meter
Engine coolant temperature sensor
Ignition system
Fuel pressure
Gas leakage in exhaust system
Open or short in A/F sensor (bank 1 sensor 1) circuit
A/F sensor (bank 1 sensor 1)
A/F sensor heater (bank 1 sensor 1)
EFI M relay (integration relay)
ECM

I was hoping for something a bit less vague. So that's where I am right now. I have the indicator lights as seen in the attached image. The car powers up but the engine does not start. The car will not go into drive or reverse. I don't know the difference between the standard DTC and the readiness DTC.