Theme Builder plugin source code?

Hi, We are currently running version 2.8.2 of confluence ( app server is Tomcat ) with the Space built using Theme Builder plugin. We want to provide novice functionality for the new space users. The novice functionality will be a set of reduced functionality of the current Space functionality. e.g.
Current Functionality: Newbies Functionality:

• Tabs * Tabs
  o Home o Home
  o My Contacts o My Contacts
  o My Communities o My Communities
  o My Share
• Profile Page (landing page) * Profile Page
  o Main Profile o Main Profile
  o Contacts o Contacts
  o My Community Equity o My Community Equity
  o Buss Box

Since we took over the environment from another group. So we don't have the detailed knowledge for the code space. But I like to get a high level idea on what does it take to make changes to remove some of the existing tabs/links from the pages in the current Space. Specifically, I like to know if any internal code changes(source code/configuration files/UI, etc) will be needed to Theme Builder plugin in order to make these page changes?

Also, do you have source code available to download for Theme Builder plugin? If yes,where(url)?

Thanks,
Mei Zhao