First of all, if Ronaldinho wants a ten year contract, I'm sure Barca would love to give him one. Second of all, we can't give him one because the longest contract a player can recieve from a club is 5 years. Lastly, this declaration was just Ronnie's way of saying that he loves Barca, and wants to spent the rest of his career here. Of course, I wouldn't have any complaints if he did.
Yeah, it was a joke. Scott Boras is an agent in the US that usually gets his players insane amounts of money. For example, he was responsible for A-Rod's 10 year/ $250m contract. I hear he only wants 200 million over ten years for Carlos Beltran though.