Once you have created your Umbraco Form add the Umbraco form widget and select your form under Form.
To authorize the site to fetch your media you'll need to create a Facebook app, and add your Instagram user account as a test user.
Follow steps 1 - 3 here: Facebook Basic Display API guide
Enter the access token under Settings > General along with your username. Then add the Instagram feed widget where you want the feed to appear on your site.
To activate Google Analytics on your site go to the Settings -> General node in the Content section of Umbraco. Under the Advanced tab you can enter your Google Analytics tracking ID.
To get the map working you first need a Google maps API key. Once you have your key go to the Settings -> General node and paste it in the input under the Advanced tab.
Go to the Settings -> General node and enter your Disqus shortname under the Comments tab