In what year did James K. Polk first take office as President?

Who succeeded James K. Polk as President of the United States? Who was President immediately before James K. Polk? Which political party did President James K. Polk belong to? Which president served from 1845 to 1849? In which state was James K. Polk born? Who served as Vice President under James K. Polk? Under which president did George M. Dallas serve as Vice President? Who was First Lady during James K. Polk's presidency?