Ummmm you're moving to the u.k with no jobs and want to claim benefits straight away? 
It just doesn't work like that, You will need to be assessed and if your savings are over a certain threshold then you're unlikely to get any benefits, As this is to try and deter benefits cheats etc.
Sorry if I sounded harsh but I worked my backside off in the u.k for 18 solid years and paid my taxes and never once claimed a penny in benefits and or social security, And somebody who may of never paid a penny in the pot suddenly wants to start taking.