The rolled collar does not give you any control and the dog could pull out of it. The choke chain, however, allows you to control your dog and the choke automatically releases when the dog stops pulling. A sturdy leash is recommended. Yes, Bull Terriers like to play. If you provide a ball for your dog, make certain the ball cannot be swallowed.
Tennis balls can become lodged in the throat.
Squeak toy made from rubber or plastic can be eaten in minutes by a Bull Terrier, a hard rubber toy or nyla-bone is safer. Don't provide an old pair of shoes, unless you want all of your shoes to become fair game. They may grunt, groan and mumble to entertain themselves and you. This conversational verbalizing IS NOT growling and should not be interpreted as a growl which sounds quite different. After living with your dog, you will easily distinguish between talking and growling.