The turbo is designed to last the life of the car. But problems in diesels usually develop when the vehicle is used for short journeys. Those 36,000 miles suggest that this car covers 7200 miles a year. This isn't enough for modern diesel engine. It has probably resulted in oil starvation to the turbo and/or oil contamination caused by the diesel particulate filter (DPF) failing to complete its regeneration cycle. Unless you plan to increase your mileage, my advice would be to sell the car and replace it with a petrol. Otherwise, further mechanical problems will be inevitable.