Following the directions all depends on how good they are to begin with. Some kits have very good directions.
As for using the same equipment... if you're using glass to ferment in, then it shouldn't be a problem. With plastic, some of that wine smell might be hard to remove from the bucket. You'll probably need a little bigger bucket for beer also. With a 5 gallon batch, you'll need at least a 6-6.5 gallon bucket. Other than that, I'm not sure. I'm not a big wine maker, so someone else will probably fill you in.