Ford Mondeo 95 computer failures

Hello, I introduce myself, my name is maxi and I am with an uncertainty of not knowing what to do ...
I tell you that they offered me a mondeo of the year 95. The vehicle is aesthetically great, the engine works perfect ... the problem is on the computer (I think), almost all its benefits work, except the air conditioning, the cruise and the buttons it brings in the steering wheel ...
I am sincere I do not understand anything of cars, this would be my first. of someone who understands the subject.
The guy sells it to me to $ 24000, many told me that it is a good car and that it is a good opportunity, but another that says that he understands something told me that if they do not work for him all his benefits does not suit me to buy it that fixing the computer is a headache ....
Can anyone have disgusted me a bit? Thank you!

The steering wheel controls as well as the air conditioning do not have much to do with the computer, independent of that if anything of the steering wheel does not work, it is most likely that it is something of the cable branch more than a computer, now if everything of the most works impeccable and the price is combined I do not see the problem in buying it since always a used car has details, in addition if you are not going to occupy the steering wheel controls then it is of more expensive We would have to see it wants to be nothing complicated but to diagnose it you have to see it.