as said before, best way to fix the cosmetics is with scrapyard parts, they're easy to find and cheap.
tow hole cover -£1
bonnet - £20-40
aerial - £3
rear air vent - £2
stone chips require careful use of touchup paint (buy from dealer for best colour match, approx £5)
scratches require a session with some t-cut (£9) and polish (£7).
sticking handle probably requires a squirt of wd40 (£2)
for broken catch on arm rest, take the arm rest off (2 bottom allen bolts), then take the plastic liner off (2 top allen bolts), add a screw in the hole where the pin used to be, refit the plastic liner to the armrest, then armrest to console, and there you go good as new it stays down. mine was repaired like this, it took 2 mins.
as for the diagnsotic issue, unless you buy a pre93 car you'll probably have that problem. its better than having nothing other than a symptom to go off. it makes diagnosis much easier, yes it costs, but in the good old days you still had to pay someone to diagnose it. if you could diy in the good old days you can still diy now.
to be honest all your problems can be fixed very easily and cheaply, so dont be lazy and get it sorted.
