Bloomberg: Toyota Motor Corp., ranked as the U.S. market’s most fuel-efficient automaker, may have to spend more than $1 billion to meet California’s requirement for zero- emission cars, said a person familiar with the matter. Toyota and Honda Motor Co. have the biggest market share in the state and starting with 2012 models must sell the most vehicles that don’t pollute, according to California law. The rule requires 3 percent of unit sales over a three-year period to be non-polluting …