Macbook Pro.[Mid-2012] Sound isn't working

Suddenly, My MBP sound isn't working. I have tried couple of way to resolve the problem but nothing is working. Here is some of the screenshot:

No, input or output sound. I would like to know

1) How can I resolve this?

2) Can you suggest any software, that can route my sound in iPad/iPhone.

Update:

After running this command :

kextstat > ~/Desktop/kexts.txt

I got only this com.apple.iokit.IOAudioFamily But, didn't found com.apple.driver.AudioAUUC

Update - 2:

As Buscar suggested to check for AudioAUUC.kext file in my /System/Library/Extensions. Yes, I found AudioAUUC.kext file in that folder. As you can see in the image No indicates, it's not loading.

LOG UPDATED: http://ift.tt/1CirVio

New Log: http://ift.tt/1CirRPI

Update - 3:

As suggested to Resetting the PRAM didn't worked. I was able to update SMC and not EFI Firmware. It's showing an error:Software is not supported on my system.

However, I also tried to load and unload Apple High Definition Audio (HDA)AppleHDA.kext. But, while loading this error are showing

1/24/15 8:29:57.000 PM kernel[0]: Sound assertion in AppleHDACodecGeneric at line 1280
1/24/15 8:29:57.000 PM kernel[0]: Sound assertion in AppleHDACodecGeneric at line 1580
1/24/15 8:29:57.000 PM kernel[0]: Sound assertion in AppleHDACodecGeneric at line 1073
1/24/15 8:29:57.000 PM kernel[0]: Sound assertion in AppleHDACodecGeneric at line 1073

Update - 4:

As you can see com.apple.audio.sandboxhelper is missing.