You can import a local (non-versioned) directory to the repository with the svn import command:
svn import -m "Import folder TeX" ~/TeX svn://SERVER/DH/TeX
After that, you can do a checkout to your local folder again. Now, you might be able to do this on existing folder using the --force
flag:
svn co --force svn://SERVER/DH/TeX ~/TeX
However, I'd recommend backing up your local folder and performing a fresh checkout:
mv ~/TeX ~/TeX_bak
svn co svn://SERVER/DH/TeX ~/TeX