I have a 2009 Mercury Milan premier 4 cylinder 6345, miles. I have changed the fuel pump, fuel filter, alternator battery and checked fuses but car still will not start. First it would start than stall out while driving down the road

Everything comes on properly and security light goes off properly turn the switch over and it won't crank but will crank it with the solenoid

I drive it for hours cut it off, won't start. Let it sit for a day won't start. Replace battery several times, still won't start. If I unplug the battery cable when I cut it off, connect back and the car will start

The traction control light came in and everything went haywire and then shut the car off and it won't crank or do anything then after 3 to 5 days it would crank and after a hour or so the car would go haywire again and wouldn't crank so I pulled out the switch reprogrammed the key for the immobilezer and hot wired it and it was good for about 6 months and then it started again so put in a new switch but B4 that I started checking fuses and there was a whole block of fuses out don't know why but replaced the switch I'm not a mech but I don't know what's the problem is can anyone shoot a suggestion. Not many folks know a whole lot about any of this so anything could help