Just as a guideline for you, here's a few markets available at the moment for the season: (best prices taken)
WDC:
Alonso 3/1 (Boylesports)
Vettel 9/2 (bet365, Betfred, BlueSQ, Paddy Power)
Hamilton 11/2 (bwin.com)
Schumacher 11/2 (bet365, Stan James)
Massa 10/1 (bwin.com)
Button 14/1 (bwin.com)
Webber 14/1 (888sport, Ladbrokes)
Rosberg 28/1 (bet365, Betfred)
WCC:
Ferrari 7/4 (William Hill)
McLaren 11/4 (Betfred)
Red Bull 7/2 (Stan James)
Mercedes 9/2 (Stan James)
Rest are 33/1 or above.. USF1 are 500/1.. just no.
Specials (all with William Hill):
German drivers to finish 1st 2nd and 3rd in any GP 3/1
British 1st and 2nd in British GP 5/1
A constructor to switch to a green Biofuel as their main supplier 33/1
Lewis Hamilton to out qualify Jenson Button in every race 33/1
Lewis Hamilton to finish on the podium in every race 40/1
Michael Schumacher crash to determine outcome of World Championship D) 40/1
WCC Winning Nationality (again, with William Hill):
German 11/10
British 2/1
Spanish 13/5
Brazlian 7/1
Australian 14/1
Japanese 40/1
Polish 40/1