Generate mesh base on 3d array of voxels.

How would I go about generating a mesh and the texture from a 3D array of voxel data. The array would just be integers that determine the colour of the cube.

I have absolutely no idea where to start or how I'd go about implementing something like this.

 

Lucky for you there are literally dozens of voxel engine tutorials designed to take you from nothing to minecraft right in the Unity3D editor! Google and you will be amazed what you find video-wise.