SO, he needs exercise and this means winter, summer, fall and spring. Having a second dog will also provide more exercise in the form of romping and chasing. This breed is intelligent, but also independent. Dalmatians learn easily, but it may not be what you want, if you don't train your dog. Find a recommended instructor with some background in dog training who uses incentive or food reward.
Incentive teaches better than force.
Should problems arise in controlling your dog, have him sleep only on a bed on the floor. Have him earn his rewards and he will thank you by being mannerly. Trained dogs are loved, welcomed and enjoyed, and don't lose their happy homes. Walking most Dalmatians with a buckle collar is not fun. Large, active or untrained dogs respond well to a No Pull collar which uses cords under the armpits for control.