To modify access permissions and users configuration need to modify the
svnserve.conf file, which is under Repository > Conf > svnserve.conf file.
And uncomment or add following lines
[general]
# Anonymous access – Readonly permission
anon-access = read
# Authenticated access – Write permission permission
auth-access = write
# Username and Password database file.
password-db = passwd
To add users to the repository need to modify the passwd file, it will be in Repository > Conf > Passwd file
And the passwd file syntax is like username = password.
# Sample password file.
[users]
Admin = admin
Guest = guest
Save this file.
To run Subversion server, type following command in the command prompt.
svnserve.exe –daemon –root <physical path>
To connect to the repository using subversion client(ex: tortoise svn client)
svn://localhost/repositoryname
voila! you configured the subversion. 
