Install Tkinter without root access
don't have sufficient reputation points to comment, but isn't this question Install Tkinter in linux similar to yours??.
To summarize, if you are sure that Tkinter is not already installed (and not that your python path is not correctly configured), I would suggest you to use some tools like easy_install and then do
easy_install --prefix=<local-dir-in-python-path> python-tkgenerally I use ~/.local/ as the prefix.
easy_install can be installed by installing setuptools