The usual TomTom drum startup sound should be working as it's built into the navcore but there are no standard sounds for either shutdown or keystrokes...so you must of had a custom non-standard sound package installed on your device prior to the format?
However, I've uploaded my sounds folder for you here:
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The above is the same set of sounds that I have across the 3 TT's I have.
The standard set of voices can be found
here