Woman driving :-)) Alfa 146

Hello guys A month ago I bought my first own car. please see photo (1.) http://img221.echo.cx/img221/8287/16nq.jpg and (2.)http://img221.echo.cx/img221/4043/29ym.jpg As a student I couldn’t afford more, but I want to admit the car I like very much .Car is of course needed and needs to be some things again. That’s why I wanted to hear some tips and advice from you when I find a few minutes of time I’ll be very happy.)))) Here are data what I’m looking forward to. I already know about my car. Alfa Romeo 146 1.6 stands on the engine “Boxer” (engine is small and looks rare) 130,000 has run, first registration 10.1995 I unfortunately have no operating instructions.(or how it is called) I heard that if you buy a used car, you have to exchange some things. Please give me some tips what to replace now(must) to make sure the car doesn’t stop running :-)) for the quick answer I thank in advance Natali P.S. Please see picture (3.) http://img221.echo.cx/img221/8302/39jc.jpg , this review makes ADAC free of charge.-) someone has a clue what this is :-)) and what else: how much fuel is consumed for 100 km? Please excuse my “High German” and “many questions.”))