Macintosh IIci

I bought a Macintosh IIci from a school that was upgrading their computers a number of years ago and stored the computer for future use. Of course the school cleaned all the software and the operating system off the hard drive. My use for the computer would be for internet browsing and to be compatible with some teacher programs that my wife uses with a g-3 power book with an OS 8 or 9 operating system.
Two questions:
1. Is it worthwhile buying an operating system and getting software to make this computer work?
If so, where do I get the stuff?