You'll have to lower the front and back differently. For the back, take the car to a kamani wala and ask him to put metal spacers/blocks below the pattay, tell him you intend to lower the back, he'll understand if he's experienced. For the front, try to locate either lowering springs from another model Toyota that are the closest match to your mountings or get a set of the closest matching coilovers and have them altered to match your mountings.