I'm looking for some open source, free to change and use Intranet written on Python+Django. Just want to find some foundation to build site on top of it.
If you're looking for a prebuilt site, have a look at Django-CMS, a Content Management System. If what you need is very simple, and you have a large amount of trust in your Users, you can probably get away using the admin
contrib package that comes with Django.
For deployment, you're looking at setting up an Apache web server on an internal server somewhere, installing mod_wsgi, and deploying that way. There are many tutorials on how to do this.