Welcome to the forum.
Zodiac Pros (especially early ones) are PVC. The tubes are thermo-bonded during manufacture. PVC should be good for 10-15 years, but as you're in Spain - the boat probably had a hard life with extremes of temperature, if the inflatable tube-set was replaced. In addition - they're not fitted with pressure-releasing valves which can compensate to a degree if out in the sun all-day.
The're also relatively shallow V hulls, so will have a tendency to slap in the rough stuff, that's my experience.
The Pros also have slide-on collars which means you can remove. Certainly worth doing to check and clean the boat. Deflate the inflatable tube, release bow strap and transom straps and hall backwards. Fitting is as per reverse with a little washing-up liquid to lube. Probably a 2-3 person job to refit.
Engine-wise, no experience of Selva engines, but sounds a little under-powered depending how many people are on board. Like anything - get it checked over, serviced, etc.
You'll need an ICC licence for that size of engine, insurance paperwork, etc.