My Simple Theme
Setup - Search
For the search bar to work you need to create a static page called "search-results" in the Ghost dashboard and add the code that you got from google custom search.
Setup - Contact Page
I use formspree for my contact form, go to formspree.io and follow the instructions, when you got the code create a static page called "contact" from the Ghost dashboard and add the code.
Currently using this template on my blog at seanoneill.me