Scripts for objecst are not fully displayed in the Details window. Select and object, i.e. a view, right click | View Details. In the Details window, click the Script tab. The script listed for this view notes
It does not show the full script and the source table.
The tabs for the Details window is also limited. Depending on what object tab you've chosen in the object explorer, different tabs are available in the Details, but they are still incomplete.
Also notice that some Menu items and features are also not available. Using Customize to move the features does not help either.
TDA connection to the database is using ODBC. There are some limits to what can be accessed and displayed since the info Toad needs may not be accessible/available with the ODBC driver, and may require the use of the Oracle client.
Connect using "Oracle", not "ODBC".