Ok first the door issue, you'll have to remove the inner door trim which is very easy and see if the connecting rod from the door latch is still connected to the handle, if it is then check at the other end to see if its actuating the door latch, if its broke at either end then you'll need to repair it or replace.
The windows issue could be the switch on the drivers door/passenger door/wiring in the rubber tube that connects the body to the doors, i'd try a replacement switch first, also have you checked the fuses?