no crank no start all things work?

hi from south east Detroit..all the sudden no crank and no start. All things work minus the important things like starting and running! Push button start gets pressed and then follows all warning lights and sounds across the dash. Anyone have this problem? I'm not very knowledgeable is auto repairs to start off people have told me needs a new battery, starter, alternator..all are new now with no changes. I've checked fuses, relays and NOTHING has changed. any info for beginners would be great. I'm at a loss