Toad Intelligence Central (TIC) connects to Oracle datasources using ODBC and this must be installed on the same server where the TIC service is installed.
Please refer to "Help | Installation and Startup | Install Toad Intelligence Central | Install ODBC Drivers" for further information.
NOTE:
If installing an Oracle Client, ensure you install a Full client and click on the “Administrator” radio button in the Installation Wizard of the Oracle Client? If you do not click on that, it will not install the ODBC drivers (and many other components). If you did not choose “Administrator”, run the Oracle Client installation again and ensure you click on the “Administrator” radio button and finish the installation.