In all honesty, that looks like a proper shed... lol.
I doubt it has hids, it was an option but I think on later cars than '99 (and was standard fitment on Sport models). You can confirm by looking by the mirror adjustment switches, if there is a numbered knurled dial, that is the manual headlamp height adjuster. Hids have auto levelling so that dial is missing.
As it is an import, technically it would be an Aristo and therefore a grey import, which can put insurance up.
I would walk really, if they have been driving it around on trade plates, why would they not MOT it, if it comes without, I would assume some costly issues to resolve to get an MOT (as I can't believe they wouldn't have tried to MOT it). Plus it just generally looks battered and tatty.
As far as getting the washers working, there would be a couple of checks to do first. Is it just the nozzles missing? If you activate the washers, does a strong jet of water just fire out all over the shop. When they are present, when you activate them, they kind of motorise out the bumper before squirting the lights, if that whole unit is missing from inside each washer hole, you have even more work to do.