First up; get everything that is required
There should be some tools installed on your system. Gulp is a requirement for using gulp serve
npm install -g gulp (might be required to run elevated)
Then the local dependencies
npm install
bower install
Two commands need to run in parallel (basic polymer-starter-kit and additional simple websocket server)
Run node index.js
Run gulp serve
https://github.com/polymerelements/polymer-starter-kit/releases/tag/v1.0.3