Once mature cocks will crow from dawn to dusk, they are classed as a noise nusance and if you are in a built up area you may need to either re-home or cull - sorry! You might try going back to the supplier and asking to swap it for a hen.....

As to the eggs - yes you can eat fertile eggs, but should do so fairly soon after they are laid - sounds horrid but you don't want to crack an egg and have something 'other' fall into the pan!