In this section only 2 settings refers to Live Search, so we will only introduce them. The other settings can be found in all Joomla modules, so those won't be described here.
Admin debug mode is only suggested to developers. With this options the settings will be showed in a textarea in format what Joomla stores the datas. It can helps to fast modify a setting, but for only, who knows what is under the hood.
Where to get Dojo?The Live Search use the Dojo JavaScript framework. It can be loaded also from google server, and from locally.