Hi,
First, try hitting the tab key? The tab key on your keyboard will hid all your tools, and you may have it it by accident. If that doesn't work, you can try resetting your Preferences. Here is a help doc that will give you the information you need to save all your presets, and I would suggest doing it manually. https://helpx.adobe.com/photoshop/using/preferences.html
If following those steps still does not bring your tools and panels back, then I would suggest reinstalling the program. But start with the simpler options first!
Let us know if that works or if you still need help.
Michelle
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