RE:Door Won't Open
I've had the door bowden cable break on my driver side rear door resulting in the door not being able to open on the outside (being that it was the outside cable). Sounds like yours is a bit more complicated given that it is both inside and outside handles, and the door lock that are not operating. Pretty weird.
Sounds like the door latch mechanism is hosed (not the cables).
Assuming that you can open the window try opening the door from the inside and outside handles at the same time - pull them at the same time. Try it a few times - sometimes this works although I don't know why.
If that doesn't work, and no one else comes up with a viable answer you can actually pry out the door handle from the door (it is a separate piece from the door). This isn't pretty (possible damage to door handle carrier and exterior bowden cable) but it will give you limited access to the door latch mechanism once it is out. It is unlikely that you will damage the door handle itself as it is a fairly sturdy piece - no guarantee of that though.
From there you can snake your hand under the door latch and try to lift the mechanism that holds the door to the body (just follow the cable down to the connection). Not pretty but I have done it. Use plastic tools to pry it out from the bottom of the door. I put a piece of a wood shingle below the handle to pry against so that I did minimal damage to the door. It takes some patience. You have to pry up a corner, hold it cracked open with a plastic tool, and continue to work your way along the bottom with another tool until it pops out from the bottom. Do not try to pop it out from the top as the handle is not meant to come out that way.