Yes.. the 145/6/156/GTV have a floor which is not galvanised and can rust. Check at the end of each footwell, where the drain holes are. The rubber schutz can lift, which lets the rust get in. The floor is ribbed... but the rubber coating should be smooth (dimpled) and flat. If it has a bulge in it, then it could be rusty underneath.
Having said that, small holes are easy to repair so don't turn down a good car because of a small bit of rust.
Also check along the inner sills.. though this area is a bit more resistant.
The motore is bullet-proof but only if you treat it like a racing car. It needs to have good oil, always topped up (they can burn up to 1 litre per 1500kms.. though some use nothing at all) and they need to have the cambelt, tensioner and pulleys (buy the kit) changed every 3 years or 60,000 kms. The later kit has a metal tensioner (early ones were plastic and why the engine has a bit of a reputation for being unreliable).
It's wasy to work on and bits aren't tooo expensive. At your mileage you might need new spark plugs soon. They were supposed to last about 120,000kms (they're Titanium/expensive.. so your may be new or they may be not). There's 8 of them so some people might leave the old ones in there or fit cheaper plugs.
Suspension is way simpler on the 146 than on 156/GTV and should be a) silent and b) bomb-proof. Dampers last way past 160,000kms.. though look at the tyres. Inner shoulder wear might mean the wishbone arm bushes (wishbone arms) need replacing.
Clutch should go past 160,000km too. It's pretty tough.
Check the usual.. gears and clutch smooth.. brakes all good (the rear discs should be clean.. not rusty) and exhaust isn't blowing or smoking. Radiatore can get killed in action if the guy used the motorway a lot... so make sure it doesn't have holes punched through it.
But.. it should be cheap compared to 156/GTV and it's easy to fix..
so it's a good buy.