With fewer than three weeks until the kickoff of the new Obamacare health-insurance exchange, Florida's 3.8 million uninsured residents still don't have answers to key questions, such as how much will the plans cost, what they will cover and how to sign up. Gov. Rick Scott and the Florida Legislature opted not to participate directly in Obamacare, making Florida one of 26 states that have left it to the federal government to set up the online "exchange" that will enable individuals and families to purchase subsidized coverage. Obamacare requires that most uninsured people purchase coverage — either through their jobs,...