Been down seen the car tonight(mk2 ) shes done 105k need to get a new window mechnisim just had the head gasket water pump cam belt and timeing done

when shes runing both the water and oil light turn on ive been told by the lad i need to flush the sytem. Checked the header tank good water and good oil as well. Any ideas what it could i managed to barter him down from 350 - 250 cash GET IN

she has a full straight through exhaust system smoked rear lights and big bumpers