depends on your budget. you can pick up some callaway x-16's or 18s irons for a reasonable amount. even though you are a beginner DO NOT buy graphite shaft irons, the sales guy will tell you they will "fit your game" the best, this is BS, graphite irons are for slow swingers/seniors, make sure you get steel shaft irons.
Drivers and Woods are trial and error, most courses will let you play a driver for a round to try it out or your local golf shop will have a swing analyzer/simulator to try them. Most will allow you to take to a range (deposit required) to try it out, they will tape the face, this wont greatly change the performance.
enjoy learning this game, its amazing how addictive it can be and frustrating!