A little bit more care is necessary for violins. Guitars are actually pretty durable, but violins are fragile. They need cleaned frequently, and the bow needs rosin. Some have replaceable bridges so you might want to do that if it is in bad shape. They are not as technical as guitars are though. Also, the tuning pegs on some violins are loose and won't stay tuned so you can buy a wax-type substance to rub on it to hold it in place better. I'm not an expert on violins, but I hope this helps a little.
Also, I agree that violins are a lot harder than guitars. I love ALL musical instruments and try to learn as many as I can, but I never could understand the violin. Guitars are easier- hooray for frets! Anyway, congrats for learning a cool instrument and good luck getting a nice one.