When you turn your key to the ign position, where all the lights on the dash are on but you haven't started it yet. Do you hear a buzzing noise coming from the back? If not, check your fuel pump fuse. If it is broken/blown [https://cimg2.ibsrv.net/cimg/www.mustangforums.com/750x562_85/650/JPEG-1Good-and-Bad-Fuses-95650.jpg|like in this picture] then pull it and replace it with a fuse of the same rating. (colour). Should be spares in the fuse box. Usually on the back of the fuse box lid will be a list of the fuses and what they do, their numbered location and their rating. E.g. 15 amp is 15A.
If you change your fuse and you turn your key on again only until all the lights are on the dash and you hear a buzzing it should start.
If not the fuse, then assume your fuel pump is dead and will need to be replaced. Sometimes you will hear the buzzing and still no go. Could be a lack of pressure issue. If you change your fuel pump always change your fuel filter, it will be old and dead by now.
Let us know how it goes.