Number of problems here. Running on its own could be due to turbo bearing oil seal failure or a high sump oil level. Anti Pollution Fault is probably the diesel particulate filter and the car probably had a tank of Eolys fluid to aid DPF regeneration that is now depleted and needs refilling. The ESP fault is another issue entirely and may be due to failure of a wheel sensor or to failure of the brake pressure sensor in the ATE Teves Mk 69 ABS/ESP module. That cots about £400 to get fixed by www/ecutesting.com, plus the cost of removing and refitting the module. Collectively, if it needs a new turbo, new DPF and Eolys system and the ESP fixing, you might be looking at expense which is greater than the value of the car. If you're lucky you'll get away with maybe £750.