When Volkswagen AG admitted in 2015 to rigging 11 million cars to cheat emission tests, few people would have guessed its sales would surpass Toyota the following year — thus securing its crown as the world’s biggest seller of automobiles. The German carmaker’s 2016 earnings, released late on Friday, were marred by another 7.5 billion euros in diesel scandal costs, bringing the total to 22.6 billion euros.