Tom Coughlin doesn’t know where Terrell Thomas got the idea he only wants to coach one more year. The Giants’ boss threw a bucket of cold water on his young cornerback’s recent declaration yesterday, making it clear he still has plenty of goals left to accomplish with Big Blue and isn’t ready to walk away. “I don’t even know how a young man would come [to making] that statement,” Coughlin said at a news conference during the NFL scouting combine. “I approach each year the way I’ve always approached them. The energy’s flowing good. I’m excited about it, and I’m looking forward to this offseason and getting our football team together again. Maybe at some point, I’ll get the message. But it certainly isn’t right now.” Then again, Thomas might have been off by only one year. That’s because Coughlin — who turns 67 in August and is the league’s oldest coach — at the same time refused to publicly commit to coaching beyond his current contract, which runs through the 2014 season. “Ask me that next year,” Coughlin said. “Next year is 2013 for me, and I’m geared up for that. Let’s go do that, then we’ll talk about whatever else. I’ve got two years on this contract. I haven’t spent a lot of time thinking about it. I’ve got goals and things I want to get done ... as part of this great New York Giants organization.” But as upbeat as Coughlin was yesterday in the halls of Lucas Oil Stadium, where just 12 months ago he won the second of his two Super Bowl titles, he admitted the Giants’ disappointing 2012 season — and it’s messy aftermath — have worn on him.