As Ashcroft indicated, trap and skeet are at opposite ends of the choke spectrum. Your gun probably came with an IC choke, mod and perhaps full. IC will work for skeet and modified (at 16 yards) and full (16 yards to 27 yards) will work for trap. If you decide that you want to shoot lots of clay targets, then you can buy additional choke tubes. I'm not a fan of most gun manufacturer's choke tubes and recommend aftermarket tubes, like Briley, Trulock, Carlson, etc.
Before you spend a bunch of cash for competition choke tubes, you might want to look at a different gun for clay targets, tailored to what targets you want to shoot.