Questions about the Toon/Basic Outline Shader

I have a few questions about the Toon/Basic Outline shader - I'd like to make some alterations to it but have little experience with Unity. I should also point out that I'm an artist, not a coder, so anything involving scripting is going to cause me some trouble.

1. I've noticed the outlines do not appear if the Main Camera is set to be isometric, rather than perspective. Is there a way around this?

2. Textures using the shader appear fully lit, independent of lights in the scene. How can I light these textures?

3. Is there a way to define an outline thickness that doesn't resize when the camera zooms in or out?

4. Is it possible to change the colour of the outline, so that it takes hues from the texture it surrounds? Or to change the shape of the line (the stroke, for anyone familiar with Adobe Illustrator) so that it looks like, for example, chalk?

Thanks in advance to anyone who can point me in the right direction!