My drivers side back door will not open. It was frozen I thought, it wouldn't open from the outside but opened from the inside so I messed with the child safety locks and now the door will not open at all, although the window works fine...any suggestions with out having to take the door panel off. When I use the auto lock switch I can here the locks but nothing opens

SOURCE: child lock

i have no clue

SOURCE: !993 subaru legacy doors dont unlock

If it takes that much force to manually open the doors, and it's on the doors that are less used, then I'd bet it's a set of door locks and actuators in need of lubrication. 
Electric door lock actuators can easily be stopped or slowed down by resistance in the mechanism. This can be caused by corrosion, water getting into the door, and just old age and lack of use. I'd take the door panels off and take a peek. 
On the Legacy the panels pop off fairly easily. You'll need to pry them off carefully with a flat screwdriver. You'll feel where the fasteners are, where the panels are resisting coming off, and prise the panel gently and firmly at these points and they'll pop out. Once out you'll see the lock mechanism. 
Moving it by hand will tell if it's corroded or bound up. Apply some white litium grease to the mechanism, making sure to squirt/work it in, and then work the door handle/mechanism to get the lube into the linkage and actuators. Check the electrical contacts for corrosion while there and spray with WD-40 to protect them. This should free up the door mechanism and the actuators should then be able to do their job.
If after the above steps the electric actuators still don't work, use a voltmeter or circuit tester to check for 12V at the actuator when the door button is pressed. If you don't see any power, recheck that fuse and then the wiring back to the door harness. It's unlikely that this is the cause as its unlikely that you'd get only 3 out of 4 bad, but you never know in these old cars.
Hope this helps.

SOURCE: the switch on the rear doors for the child safety .

you can try spraying a small amount of WD40 into the switch and work it back and forth till it unjams

SOURCE: Subaru Outback 2005 - Driver side door/window

The switches in Subarus are made by Nissan believe it or not. They are not interchangeable. Anyway, I suspect you have a bad window switch. You can pickup the whole bank of swiches or replace just the one. Do a search on ebay for your part.
Has this car had body damage on the driver's door? You could have a cut wire inside the door.

SOURCE: Passenger Door won't open from inside - not child safety lock

as leegallacher said its more than likely the interior door cable stretched or ends worn.

Testimonial: "That was the problem."