What you're really looking for is exactly 1 shortcut: cmd+shift-p (or ctrl-shift-p, depending on the platform) for the command palette, where you can fuzzy sear

What you're really looking for is exactly 1 shortcut: cmd+shift-p (or ctrl-shift-p, depending on the platform) for the command palette, where you can fuzzy search for every available command. If a command has a keyboard shortcut (toggle terminal has one), it's in that list. It even shows your custom shortcuts.