You could use the Umbraco UI to create your CSS file. Settings > Stylesheets > ... > + Create and create a stylesheet called style (don’t add the file suffix .css) and paste the CSS in I find it easier to copy the CSS. Using either method should be noted does NOT include them in your HTML markup automatically – Umbraco produces clean output and this means you only wire up what you want and need.
Next copy the scripts folder from the js directory of the Initializr template to the [your website root]\Scripts directory – we’ll have to update the template to look in /Scripts instead of /js. To do this go to Settings > Templates > Homepage and change line 21 to say “scripts/...” and click Save.
Now using Chrome Developer Tools or Firebug whilst browsing http://localhost you should find that the network tab (or the equivalent) doesn’t report any missing assets / files - if it does have a look and fix any typos / check the files are in the right places.
How to wire the Umbraco Document Type Properties into the templates to output the editor's data in the right place.