I can tell you one thing, phones don't just do this stuff by themselves. It is impossible to delete the keyboard running a unrooted stock ROM. Also I have absolutely no idea why the volume buttons would just stop working without some extreme hard coding. Unless he took apart the phone and detached some stuff in the motherboard.

There is no stock recovery, so the phone is therefore bricked. I can't help any further than this. The rule of thumb is if you have no recovery and your in a bootloop on the LG L41C, you are bricked. You can always get a free replacement from TracFone if you make up some story.