Corsa-B.uk - Vauxhall, Opel and Holden Corsa B Owners Club

Alright! so my corsa B is all going well just needa ask a few questions and get a few tips! lol
so firstly, my engine management light keeps coming on at random times? why is this, also my handbrake light NEVER comes on!
It over revs like mad when i put it in 5th gear,

And! can anyone tell me the prices of
New Window Wipers
New Horn
New Timing Belt
Subwoofer + new door speakers + parcel shelf speakers
New Brakes (pads etc)
A new back light
new exhaust (possibly a back box)
Air filter (as i bought it without one!)
sports pedals
New battery plate (mine is unbelievably rusted)

Also how much is it to get the rear wiper removed and the hole smoothed over, and how much is a respray and how much is it to get all the rust and dents fixed?

Lastly! the leather seats are from a calibra, and it needs new casings! for around the metal bits! and how do i fit my after market mudflaps and hook up the cars Ariel to the aftermarket CD player!

Sorry for all the questions but im clueless! lol
so be honest with prices where could i get stuff cheap/cheaper etc!
Thanks!!

Forgot to add! Clutch bite is farrr to low! and how do I Properly paint my alloys/brakes! as the paint on the alloys and parts of the car are bubbling!!

New Window Wipers are about £17 each for the normal ones or about a tenner each for the aero wipers
New Horn should be about £10-£15
Subwoofer + new door speakers + parcel shelf speakers Sub you'll be looking about £100 door speakers about 40 and shelf about 60(All this is roughly the average and can vary greatly)
New Brakes (pads etc) No idea
A new back light if it's the entire light then about £30 from scrappers, bulb will be under a tenner
new exhaust (possibly a back box) about £50-£70
Air filter (as i bought it without one!) up to £100 depending on the quality and other things
sports pedals about £20
New battery plate (mine is unbelievably rusted) and no idea again

To properly paint you calippers you need to take a wire brush to them to clean off all the sh*t and give a lot of thin coatings of high temperature paint that you can buy from halfords for next to nothing. The longer you spend on this the better the finish will be. Wait an hour or so for the THIN coats to dry before you apply another or the paint wont dry all the way through (my mate made this mistake because he was impatient and it looks awful!)

Alloys are simple; Sand with wet and dry, primer, paint and laquer

Tape the tyres up though or it will look weird.

Can't help you with the clutch problem mate.

Hope it helps!