There is a php project and 5+ developers will work on it. We will be using Eclipse and related svn plugins in order to handle project development better and benefit from version controlling.
We bought VPS server and setup UberSVN (created a repository). Simultaneously I generated the files via a framework, which we are going to use for the project.
Now what should I do next? Do I need to link repository and files? If so, how? Should I get files from SVN or server when setting up the project on Eclipse?
Sorry, I couldn't guess what to google.
UberSVN will get your repo up and running, and take away all the hassle from setup. You'll need to setup your users if you haven't already, see here for details.
Given that you've tagged this with Eclipse you'll want to read the quickstart guide here.
That should be enough to give you day to day use knowledge.