Ok lets check basics first
do you have lights on and power to head lights this is a plus if you do
if you dont its either dead cell in battery or bad alternator that wont charge battery

ok did you try a manuel start tool too starter or old fashion way jack car up and apply long screw driver between power cord and ground on starter this is also a manual start if car turns over its not a relay

look at your key has it been worn down or is it brand new these are indicators of old key cylinder wear
i had to replace my key cylinder the first day when i bought my truck they made me new key but cylinder was wore out i had several problems with other vehicles in this manner
if you made a new key cause old key was bad that doesnt change the fact that key cylinders wear out too

the relay panel is under the hood on fords now heres a suggestion to test them find similar relay in panel box pull out and place in bad relays place
this can tell you if the relay is truley the culprit but remeber when you change it put the other back in the spot you took out
cars come with average of 6 to 8 exact relays for different components of vehicle but they are the same in the panel

did you install a new car sterio system in the vehicle if you did you probably got the wires crossed or not in right place on wireing up radio fords tend to run a couple components threw sterio wires under my profile here i speak of proper wire harness and wire connections this is crucial

this is basics without computer diagnoses its the most info i can give you at this time