Brake Hoses, Lines/piping, And Fittings problems of the 2000 Jeep Wrangler

I own a 2000 Jeep Wrangler which I bought new. Recently I began having trouble shifting into second gear and sometimes it would pop out while driving. Soon after I began to have brake issues and had a mechanic look at it. He said he had never seen a Jeep rusted out so bad with so few miles on it and said it was a hazard to drive. He said the brake lines were rusted through as well as the support for the transmission . He said the frame was in terrible shape and said I was lucky the thing didn't fall apart while I was driving it. This vehicle only has 85,000 miles on it.