If I have a drill press, and I set it at a certain height, and I put a router bit on it, would I be able to then theoretically use my drill press as a router to make joints in wood?

Also, If I want to cut through metal pipe, say, SCCA roll cage thick tubing, but I already have a 1hp band saw, would I be able to cut through metal if I change out the blade, to something with more teeth per inch on the blade?