Idler arm is attached to the LH chassis rail, just behind the strut. It is probably the bushes that are worn - they can be replaced by urethane ones (available from Pedders).
Tie-rod ends are attached to the rear side of the strut, and have a threaded length of rod screwed into them.
Ball joints are sandwiched between the lower control arm (connects bottom of strut to engine cross-member) and the strut.
The oil sender, IIRC, is a 14mm hex nut. You will need an open-ended spanner to remove it.
Replace the front muffler with a hot-dog muffler.
Hope that all makes sense.
EDIT: Actually, I think to replace the ball joints you need to replace the whole lower control arm.