For the power windows the install isn’t hard if you have the powered door and you will just replace it. But, you will spend more of your time routing wires/figuring out how to power them on your car because it wasn’t wired for power windows. You need to add some wires. But, seeing as how your car is a 96 it may already have some of what you need already in it. It seems like newer cars (03+ are “generically” wired and then the factory will add the options during assembly, Particularly FORD. You may get lucky.).
Look and see if your Fuse Block is already wired because you may be able to simply add the relay first. Then connect the Block to the Drivers Door (again you may get lucky and there may be a unused connector in the doors harness already) and then tie the Drivers Door to the Passengers Door through the same “unused” factory wires.
If you open the block and absolutely nothing is there you will need to add a relay on the 12volt line to the window motor. You may want to get a power window kit from Autozone/Pepboys to help you and give you some “Extra” parts to use in case your car has nothing to use.
For Locks, It should be pretty similar to the windows.