650b Croix De Fer - Congratulations, it's an apple.

So I think I've basically neglected the bike through the winter as it seems to be throwing a few toys out of the pram all at once.

1. Either the front calliper is gunked up or stuck, or the cable is sticking as the brake doesn't open properly after braking sometimes
   
2. The front disc appears to resemble a pringle - I cannot get it true :(
   
3. There's a nice loud clicking coming from the rear hub. No idea if it's freehub body or wheel bearings.
   
4. There's a slightly less loud clicking coming from the front tyre - like something's stuck in there. Only I can't see or find anything.
   
   

Not quite sure which one to attack first, or if I can even strip/clean the brake calliper if necessary!?