For this you will need two DPDT (Double pole double throw) toggles in ON- OFF- ON configuration. You can get these from any guitar parts store or Mouser.com
I've done this wiring for a few of my guitars.
Now this really depends on the pickups you are going to use as each has their own color coding. For the sake of simplicity let's just use Seymour Duncan.
The black wire (hot wire) will go to the top left lug of the dpdt. You will run that connection to the pickup selector.
The white and red wires which, are wired together, go to the middle left lug of the dpdt switch.
The green and bare wires go to the bottom left lug of the dpdt. You will run this connection to ground.
Repeat for the neck pickup, you will get either coil with series humbucker in the middle.