In reply to MysteriousCeorl:
Yes, carrying kit is going to be your problem unless you go lightweight and get someone to courier the stuff out once you've got an address. You can use Google Maps to get you there, a cycling buddy of mine used it to get him from Blackburn to St Ives for a wedding and it worked well, taking him down some lovely routes.
On Chamonix, I would say you are heading for the most expensive honey-pot in the French Alps. There will be lots of competition for bar jobs, chalet jobs etc. If I was you I would carry on up the valley to Argentiere, which is at the foot of the Grands Montets and is where serious ski bums and tourers hang out - it is probably also slightly cheaper than Chamonix and is certainly nicer and quieter.
Depending on funds I think the best advice would be to get out there and start networking; buy drinks for people and ask questions and you'll soon get to hear about new season jobs going. Your manner and personality will matter much more than your CV so you need to get your face in front of bar and chalet owners and create an impression of trustworthiness and the ability to work hard without whining or insisting on your rights. Can you drive? I managed an entire season as a chalet "gofer" in Megeve, collecting clients from the airport and taking them skiing in the afternoons, all on full board and expenses but no wage.