3D TopDown Shooter Movement Script

So im failing at making a 3D Top Down Movement Script...

I have my Camera Rotating around the Player nicely while beeing able to zoom in and out while scrolling.

Now i want the Player to move in 8 Directions (http://www.verticalfist.com/images/8directions) while also always looking into the Direction he is moving

The Best Answer would be a ready to use script ofcourse so i can study the script and analyze what line is doing what. //Notes Would be helpful too :)

like in all Top Down Shooters Jumping is unneccessary...