We adopted our BC from a local shelter when he was only 6 months old. He had never had the freedom to "run" outside of a cage. To begin housebreaking him we laid a large section of newspapers down on the floor (tiled) and immediately set him on it. BCs are extremely smart and will usually respond quickly when praise is involved. We created "outside" times every morning, afternoon and evening. He was always carefully watched in order to make sure that he did something. If he was good during this "outside" time, we immediately praised him and gave him a small training biscuit. It only took approx. 3 weeks for him to realize the schedule and treats. Scrappy is now just over a year old and still goes out on the same schedule.
Good Luck!