rightt my turbo has gone at 70k and is real smoky, running rich and wineing its tits off!

so i need to replace the turbo its engine code AUM on a 51 plate i want to change cambelt aswell as it doesnt look it has been changed. Basically first question would be what other parts would i have to change i have heard have to change the pick up pipe/oil strainer and obviously thr turbo which i believe would be a ko3s on the AUM lump? If anyone could help me with a info on how the best way to tackle this and try and save as much money as possible ? If any one lives in south east area and wants to help for ££ be much appreciated !
