Converting to power windows/locks...... in my opinion its just a headache but to each their own.
the simplest way is pretty much go to autozone get 4 window regulators with rails, gut your original doors, put your new ones in. There should be some unused fuses, not sure with your make.... wire it there. The only problem you run into is the doors wont have switches to roll your windows up or down, or door locks. So off to the junk yard, or some oem parts store.
For the alarm, depending on what your looking for you can get all kinds of alarm systems from sonicelectronix.com, but they don't make a "window roller- upper" specific button on alarm keys.
But all that you need to do is make some kind of wire configuration telling your car to roll down the windows when you hit said button.
If you're a car audio guy im pretty sure you can figure this out.