I have this 2009 Scion tC 2.4L with about 94k miles on it, I bought it preowned and Ive had it for about 6 months now. I took a trip out of state about a month ago, and one day when I went to take a turn into a friends driveway I went to rev the car and it had died. I let it coast to the bottom of the hill and put it in park and turned it off. I went to crank it back up, but when i turned the key nothing happened (just like how it is now). I gave it a minute, and when I went to crank it it started up just fine. I drove it to an Advance Auto to get the codes tested and it said I had a faulty crankshaft position sensor. So I kept driving it around, and one day I went to start the car back up and it just wouldn’t. I got it towed to my home state and back to my house, and since then i’ve replaced the crankshaft position sensor, the starter (twice), the starter relay, checked all the fuses and replaced when needed, and most recently I replaced the neutral safety switch, and still the damned thing wont start. Anyone have a solution?
edit: also, when I go to crank the car, you can hear something sort of hum for a bit and then a crackling sound. its not harsh at all.

 

Are there any lights on the dash or stored codes? If some of the lights look dim it might be the battery or alternator possibly.