Trouble with starting

Hello all, I have a '99 tacoma with 160,000 miles on it. I started having issues recently with it misfiring. I had a blown head gasket and two cracked cylinders. I had that fixed and also changed the fuel cell,fuel filter,tps sensor and crankshaft sensor. I am now having problems with the truck starting up. It doesn't seem to matter if it's hot or cold out. I am a pool guy and start my truck up about 20 times a day. Need to know what it could be. I don't mind putting in new parts but want to get to the bottom of this soon. Any and all advice would be great.

 

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