To remove your dad's device under your account, go to your dad's computer, go to Settings > Accounts > Family, if your email is listed there, change it to "cannot sign in".
Then go on the web browser, go to https://account.live.com/devices, sign in as yours, if the device is still listed, you can remove it from there as well.
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If your data is saved locally, when you did the transfer like I mentioned in my last reply, it will transfer over.