The basic principle wth unknown material is to have a lot of it so that you can do tests and still have enough to produce some pictures. Is the film in its original packaging? If so, it will probably say what safelight the film can be handled under. If not, you can cut a piece off in total darkness, leave it lying in the darkroom partly covered by an opaque object (coins are the traditional choice) for 30 minutes or so and develop it to see if it has fogged. OR you can just assume it is orthochromatic (sensitive to blue and green) and handle it under red light. The film is almost certain to be high contrast. you will probably be able to take normal pictures if you give a lot of exposure (start testing at EI [ISO speed] 1 or 2) and use a soft-working developer (like a print developer at 3 times the usual dilution). Other fun things to do with big rolls of film are to make display transparencies from b+w negs and enlarged negatives to try alternative printing processes (cyanotype is an easy one to start with). The paper will probably also be high contrast, you may find it is too slow to make enlargements. All the materials may of course be too old to give good results but could be worth experimenting with if you have time.