i've been playing for a long time and these would be my suggestions:
1) Definitely take a few lessons from a golf pro at your local course.
2) Buy a set of sticks that is designed for new/bad golfer - (certain sets are designed for spin/distance/etc... you want one that is generous (i.e. to a degree self-correcting) to the hitter.)
3) Spend a considerable time on the driving range and putting green before you play a round.
4) Play your first round on a Par 3/4 (Pitch & Putt) Course. This will emphasize your short/mid irons and putter - which are your bread & butter.
5) Buy a glove and golf shoes so that your hands and feet have a good grip/balance on the sticks and ground.
As far as drivers, oversized heads will lead to more distance in your drives if used properly. Another gimmick you could look for are graphite shafts. As a beginner, i would stay away from the graphite, but the oversized heads are fine.
Be prepared to lose some balls and enjoy yourself.
A wise man once said, "Golf is a good walk spoiled." So be prepared for some rough rounds.