the guys come on here, admitted his mistakes and is looking for assistance. All anyone has done to this point is critasize him, shame on everyone for kicking a man while he's down, at least he's attempting to rectify his error.
Firstly, the cars have been know to drive for OVER 250,000 miles, so they are expertly built and as such you cant expect to do anything cheaply! Look around for parts though, and keep away from Lexus for bodywork including the alloys!
Take the car to Lexus, and get what i think is called a VSR done, it'll be £25 plus VAT but it's money well spent and will high light ALL that is wrong. Lexus will also price to do the work reguired. Next take it to an independant garage and ask what they would charge for the work. The sensor problem will probably be best sorted by Lexus though.
The guy in blackpool has received great reviews so i would go with him, you would save £210 straight away, once done get the tracking/allignment sorted as this is probably way out after the excess curbing.
Personally i would leave all body repairs to the end as the engine is the heart of the machine and without it the car is useless!
If you fancy a trip over to Leeds on Saturday I can meet up with you and take it to the garage I use when i dont go to Lexus.