I have a ford fusion 2008.today morning it did start or respond at all with the keys.i tried with the door code not responded.keys even doesnt work to open the door.

 

You probably have a dead battery.

 

Jack it up, put a battery charger on the positive stud on the starter and ground the other line, give it a minute and you should be able to unlock the doors and open the hood and then like glc said replace the battery.