FLOL !
Is this your car ?!
Windscreen cover will cover the windscreen replacement, presuming you've got windscreen cover on your insurance ? Only you can tell us how much your glass excess is on that. If you want to know how much a screen is, ring Renault and AutoGlass. Is it cracked or smashed ? What else is damaged ? You won't be able to fit that yourself anyway I should imagine...
As for the wing, they're plastic, just replace it. Get one on here, eBay or at a dealers, or at a scrappy. Price varies, obviously.
Regarding the engine, you're in Yorkshire, ring RS Tuning in Leeds and ask them to pick it up, or arrange a tow there yourself if that's cheaper. Once you've bought all the tools, and argued with it for a few days, and then timed it up wrong, you'll take it to a specialist anyway :rasp: /pessimist
Good luck !