Who succeeded Zachary Taylor as President of the United States?

Under which president did George M. Dallas serve as Vice President? Who was First Lady during James K. Polk's presidency? Sarah Polk was married to which president? Which number president was Zachary Taylor? Who was President immediately before Zachary Taylor? Which political party did President Zachary Taylor belong to? Which president served from 1849 to 1850? In what year did Zachary Taylor first take office as President?