So I just installed Toribash 4.7, and i don't really know how to describe this other than saying the menu text is really shagged up.

All of the menus just show that. No actual text, just those little arrows in the circles, and the occasional cent sign.
How would I go about fixing this?

Update your graphics device

Everything's up-to-date. Still the same.

In other words get a better pc, the higher the version the higher the pc needs to be, so i advice a new graphics card or more ram, something like that.