ROR application doesnt include scripts and css

You're probably using a newer version of Rails (videos are quite old, they use Rails 3). The directory tree is a bit different in Rails 4, which is not the biggest problem here, if you take a look at more forum discussions. Check the Gemfile - it should have an entry like this:

# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '4.0.2'

If this is 4.0, like in my case, you will have to consider generating the whole application again from scratch using older Rails gem. The console command would look like this:

rails _3.1.0_ new treebook

3.2 should also work fine. The Gemfile in that new project should then look like this:

# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '3.1.0'

And you would no longer experience compatibility problems when following Treehouse videos.