Hi Riku,
From what I could see, and it was difficult as you say, most of
it is just flaking surface stuff. Windscreen surround is a standard rust spot.
Generally, it looks ok. I would guess it's a 1300 or 1600 judging by the steel wheels.
Both good engines, especially the 1600. 1300 a bit underpowered, ok for steady cruising.
Yes, to get it back to running and driving will consume money. But if it's been
under cover for years, it will probably have faired better than otherwise.
There are plenty folk on here, spread all around the country, who would be glad assist you
in making a wise decision. Share the location and someone will be localish to inspect with you.
Good luck.
Nigel