I've never had electrical problems with my Uno Turbo

Well, other than the fact my wiper motor and window motors are slow.
But yes - RUST, that's the only problem to worry about, everything else can be fixed economically.
Unonumero is right. You can have rust ANYWHERE on an Uno, but something I'm learned recently on the Turbo is to grasp the plastic trims on the edge of the wheelarches, and try to move the wheelarch in and out - if there's no resistance, that means it's rotted out behind.
The bottom few centimetres of each door (folded-over seams) are likely to be rusting from the inside-out and this is difficult to cure properly.
However that pales to insignificance compared with rust in the floor, rust in the roof, rust in the doorframes, rust in the door pillars, rust in the sills, rust around the rear tailgate opening, rust in the rear inner wheelarches, rust in the panel behind the rear bumper, rust in the rear suspension turrets AND front suspension turrets, rust in the... ...lighter socket, oh I think you're getting the idea.
Jai summarised the suspension; clonks are common. Easily fixed - just budget for new control arms, new steering balljoints, new antiroll bar bushes, and probably new shock absorbers. All of these are not expensive compared to newer cars and fitting is relatively easy.
f you don't fancy shelling out for an engine rebuild, you should probably check that there's no signs of water in the oil and no signs of oil in the coolant tank. There shouldn't be swirls of smoke (and the clutch shouldn't slip) when the turbocharger boosts up. And it should be possible to drive 'normally' without crunching synchros. All of these things are worth fixing, however, if the bodyshell is good.
Cheers,
-Alex