Driver side door mechanism

Lift the door handle as if you were opening it

Hold the handle & use a round phillips to hook
& rotate the white door latch to the open position

try pulling the door handle a time or two, perhaps the latching mechanism is stuck in the latched position. sometimes pulling the handle and moving the latch with a screwdriver is needed. if this doesn't work then try lifting up on the door while shutting it, if this works then you need new door hinge bushings or new door hinges

The door sensor is the problem. Have it tested, they are a known issue.

Bring the vehicle into the dealer if you have a sticky gas pedal. This is a TOYOTA PROBLEM.
Door handle:
It easy ! You need a philips and flat screw driver,and a needle nose pliar.
Use flat screw driver and pry out the two or three dust covers for the arm rest screws then use philips and remove the screws. Next use the flat screw driver and pry out the black plastic mirror cover from the inside of the door. Pry out the switch with the flat screw driver and disconnect it. On the side of the door panel just above the striker/loch mechanism is this plastic push pull type of a hold in screw. Use flat screw driver to get it to move a little then pull it out with the needle nose. Depending on which door your doing if you have a map folder in the door there are two more screw to remove on the bottom of the door.
Now the inside door handle is tricky it comes out in TWO pieces. Use philips and get the only hold down screw you see out.( you may have to pry out a little screw cover first) Now the inside door handle cover is removed by placeing the flat screw driver on the rear of the outside of the cover top and on the outside rear bottom to release the tangs that are holding it onto the panel.Pry it out lightly you may have to place the screw driver over the top of the door release button and pry that way. Don't loose your cool its a pain but it will fall out. Once its removed unhook the panel.

Next lift the plastic cover and remove the door handle hooks and levers . Basically use common sense this is easy stuff. There may be two screws from inside of door panel that keep handle in place . Then work handle loose from outside and inside . reverse for installation.

the door handle is either broke or a part of it has slipped loose, either way, you'll have to remove the inner door panel to get to it, this is not difficult, a few screws and the panel is retained by push in type plugs that can be pryed loose. the entire door latch assy is held in by screws and is serviced by replacement, the difficulty come with very tight area to work in, and is irritating and time consuming, if you are not good with tools i'd suggest a good mechanic or body shop. always get a quote!!

On the inside trim, you can remove screws that are by the door handle, arm rest, under door and side of door and then gently pull back on the panel as there will also be retaining clips attached and you don't want to break them. You'll need to lift the door panel upwards in order to get it off the window ledge. Then you'll need to manipulate the panel and disconnect the door handle linkage from the door handle and disconnect the wiring for your controls. Pull back the weather seal and you can readjust the window mechanics.

Enter car from left rear behind the driver and see if you can manually unlock it from the inside. Then use remote to test it.

One thing... If your last 3 doors works fine it's mean that problem is only in your drivers side. In VW like nickalxjoe wrote is air pump. So there might be an air leaking which you can hear. So if you can hear from where air running out try to fix this first.

remove the door panel

It does sound like the mechanism is detached from the handle.
The panel is fairly easy to remove. Just a screw in the handle where you pull the door closed, a screw behind the door handle itself and the rest are just snap in pieces around the permiter of the door. Just gently pull where the snap ins are located ( start at the bottom and work your way around both sides. ) The panel will then lift up over the door lock. Make sure you unplug the speaker and light and door lock plugs before pulling too hard!