Street Flight Turbo Kit - $5000 + $800 install
Vortech Supercharger - $3500 + not sure on install price
3.0L swap $1000-$3000 depending on how wild you want to get. You can pick up a 3.0L shortblock for about $500 or cheaper.
Kaotic Innovations Bodykit - $650 + cost of paint (They also offer a widebody 8 piece kit for $450 and a fiberglass hood w/ scoop for $350)
Carbon Fiber hood - $500
Projector Headlamps - $600-$1400 depending on whether you decide to go wtih HIDs and 'angel eyes'
Intakes - $70-$120 depending on which kit. (Not needed if you go with a TC or SC)
Exhaust - $300-$1200...once again its either a DIY job and pay anywhere from $300-$1200 on custom true duals instead of the stock svt quasi dual or pay about $500-600 for a Bosal, Bassani, Yo-Dude, Brullen, Tru-Bendz, etc etc.
Brakes - $700-$1200 depending on whether you go with Baer, Brembo, Wilwood, TCE, etc
Tranny uprade -$500-$2000....$2000 would be like a Mach III Bulldog Box which includes Quaife LSD, post 2000 syncros, oil cooler, filter, plumbing lines, etc. And of course factor in a new clutch and flywheel which is about $700.
I guess you can see where im going with this. Its just impossible to give an estimate on everything thats available for the contour. In parts alone, your looking at about $20,000 for intake, exhaust, forced induction, suspesion, wheels, brakes, lighting, and all aesthetics IF you planned on doing everything possible. This doesnt even includes prices for like paint jobs, lambo doors, or any other custom work.
Just for my contour....On my engine alone ive spent about $13,000 just on a 3.0L, Street Flight turbo kit, port and polished heads, Custom rods and pistons, Tranny upgrade, etc. This doesnt even include brakes, suspension, etc. The price range is limitless!