Bargain for a £100 mate.
A helicoil looks a little like a spring. You drill out your f**ked thread and tap a new thread in the next size up, you then screw the helicoil into your new thread and you end up with a thread your original size.
Its also supposed to be stronger than the original thread. you can get the kits for under £20 on ebay.
i dont think the front wheel is an issue really, i would defo get a new chain if you like your face the way it is, a bb and some isis cranks wouldnt go a miss too.
If your gonna be riding natural i would also put the rear tyre high on your list.