will this question cost? (Won't go on and on if so)

The tie rods are not leaking, the rack and pinion is leaking and no you can not patch that up. You need to replace the entire rack. When replacing a rack it's proper to replace the outer tie rods at the same time and you must perform an alignment after. If the ball joints have play then they should be replaced. You don't have to do these in pairs but most shops will recommend you do because if they are the same age the other side will fail shortly after. If the struts are worn out then they need to be replaced but not doing them is not going to ruin the rack. If they are really bad they could cause joints to loosen up but that's debatable. Hope this helps. Alex