Numerous errors? I followed a tutorial but it seems to not work for me

Everything that Praetor says above, said in a slightly-different way:

How to report your problem productively in the Unity3D forums:

http://plbm.com/?p=220

How to understand compiler and other errors and even fix them yourself:

If you post a code snippet, ALWAYS USE CODE TAGS:

How to use code tags: Using code tags properly