HELP! 01 Rav4 wont start after Alternator replacement!

Hello! So lets start from the beginning..
Every morning we would come out and go
to start the car but nothing, no crank,
nothing. So we would have to put the blow
dryer onto the starter for about 10-15 min
and it would start right up! It got to the
point where we would have to bang on the
starter also with the help of the blow dryer.
So eventually we got a new starter,
replaced it. Next morning, still no start,
same thing. Blow dryer for about 10
minutes, started right up.
So next we went to autozone and they said
our alertnator was failing. So we got an
alternator and changed that out, now it
wont start at all. It will turn over but not
start. We checked codes and it read the
crankshaft sensor so we replaced that.
Replaced the fuel pump, replaced the
spark plugs that were shot. What could it
be?!?! HELP!