You can install Subversion from YAST. If you are unsure of how to do this then there are many good site on the net to explain how to use this great tool.

Create Subversion Repositories

Subversion repositories are created via the command line. Open a session and switch your user to root.
Create a directory where you wish to store all your repositories. For example:
# mkdir /repos

To create a repository, you use the command line tool svnadmin. Type:
# svnadmin create /repos/<your-repository-name>

Create a Users File and Adding Users

In order to restrict access to repositories to certain users, you need to create a user file that contains usernames and encrypted passwords.  Apache provides a simple command line tool for doing this.  The tool is used to:

1. create/modify/delete users, and
2. create/maintain the users file.

The first time you add a user you'll need to create the file.  I suggest that for simplicity you store the users file in your repository directory.  Create the file as follows:
# htpasswd2 -cm /repos/user.list <your-first-username>

You will be prompted to set a password for the user.  To add more users, simply type:
# htpasswd2 -m /repos/user.list <new-username>

The Repository Permissions File

You need to create a file which dictates which users have access to which repositories.  You may want to grant all users read-only access to one or more repositories and certain users read/write access to appropriate repositories.  You can also explicitly grant or deny certain users or groups of users access to specific repositories or files/locations within a respository.  This is all done via the access file.

A good name for this file would be access.conf.  Place this file wil the user list file.

The following is a sample of a repository permission file.

# This is a comment.  I will use comments to explain each of the sections.

# You can even go down to the file access level within this file
[RepositoryName:/doc/user_documentation.doc]
tom = rw

Linking Subversion to Apache

In order to communicate with your repositories, a communication layer needs to exist that handles requests for repository information and submission of data to update the repository.  The popular open source web server Apache is used for this purpose.  Communication is done via the HTTP protocol.  Subversion is linked to Apache via a modular extension model that Apache provided.
Navigate to /etc/apache2/.
Make sure that the following lines are contained in your configuration file

LoadModule dav_module              modules/mod_dav.so
LoadModule dav_svn_module      modules/mod_dav_svn.so
LoadModule authz_svn_module   modules/mod_authz_svn.so

Now add the following to your httpd.conf

# Source is the path you will use to access the repository
<Location /source>
  DAV svn
  # The base path for the repository we will use /repos in this example
  SVNParentPath /repos

  AuthType Basic
  AuthName "<The name of your repository>"
  AuthUserFile /repos/user.list
</Location>

Restart Apache and there you go, one simple repository setup.