could you please open the Window menu and show the screenshot? looks strange, so any information will be useful.
What version OS & Ilustrator?
Window >> Workspace >> choose a workspace
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You should be able to manage your toolbars from Window > Tool Bar > Manage Toolbars…
But normally you will find the quck menu to edit your tools with the elipses in the Toolbar. I would restart the applicateion, If that doesnnt work restart the computer and if that doesnt' work reset Illustrator Preferences https://community.adobe.com/t5/illustrator-discussions/how-to-reset-illustrator-preferences/td-p/106...