When I go to Database menu | Administer | Tablespace | it does not display some Tabs i.e. Space, Space History, and IO History are not displayed or it disappeared.
Toad license being used does not have the DB Admin Module.
Make sure the Toad license key being used has the DB Admin Module Add-On. The Toad license key can be modified or changed by going to Toad's Help Menu, and then click on Register Toad or Licensing.
Per Toad Help | Contents | View Tablespaces:
Note: The Space, Space History, and IO History tabs are only available in the commercial version of Toad with the optional DB Admin Module.