x type 2.0d help and suggestions please

Hi. so in 4 years of ownership and 130k on the clock the engine was already in the injectors/pump buggered mileage range and so what happened last week.

Now my options are to either go through the process of diagnosing the problems and go on and on forever or to buy a replacement lump off ebay with warranty and drop straight in.

The only thing im not sure if the programming and coding of pump and injectors.

If the replacement engine comes with the pump and injectors already checked and ready to go what would need reprogramming to the ecu as i will be using the same ecu the car had.

and also what are the rough costs of all the coding

Thanks in advance