Here's look no. 1 at the city's new pay toilets. The first of 20 new public potties, which will soon offer New Yorkers relief for the price of a quarter, was unveiled in Brooklyn yesterday. The Space Age loos, which look more like elevators from the outside, are self-cleaning and dispense liquid soap and hot water. They are part of the city's joint campaign with a Spanish company to spruce up the streetscape. But while new bus shelters and newsstands may look good, strategically placed comfort stations will be a boon for bladders. "When you gotta go, you gotta go,"...