President Obama signaled on Friday that he was close to choosing a director for a new consumer bureau, but an array of top jobs that will be crucial to shaping economic policy and financial regulation for the rest of his term remain unfilled.

At a White House news conference, Mr. Obama praised Elizabeth Warren, the Harvard law professor who was the chief proponent of the Consumer Financial Protection Bureau and is a front-runner to lead it. Calling her “a dear friend” and a “tremendous advocate” for the new agency, the president said he had talked with her but added, “I’m not going to make an official announcement until it’s ready.”