an amazing find! around here we usually hope to find old dodge charger daytonas or superbirds in old barns, but what you found is what i would wanna find, other than a '69 charger.
not sure i would even bother with that keyboard, i would be afraid of it causing issues with the main unit. but i would definitely remove the case and start cleaning out the system.
i think alot of us wanna see whats inside also

but otherwise, a great find! she will clean up pretty good! i would proudly put that old war horse on display!
i just repaired another A1000 to add to my collection and I have another one in line for repair, I love the A1000, was my first Amiga back in 1987. you can never have too many A1000s!
good luck!
//kneehighspy