Depends on what year your car is, classic up to 99 can't be mapped directly you need a piggyback ecu or a daughter board. Which typically sets you back around 300 plus in then needs to be mapped at around another 250-350
My99 and above can be mapped by reflashing the ecu, but you have to pay for a licence and then mapping time, so around 500-600
Check to see what colour your injectors are, if they are yellow you won't need to change them 5o accommodate the new turbo