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Saint Paul, MN
If you have the vehicle in gear can you let the clutch off does it move when at idle? If not i would suspect clutch issue.
1 - The sensors in the tires can go anywhere but need to be reprogrammed to the vehicle on where they are at. Some vehicles only let the customer know a tire is low but not which tire. Some vehicles tell the driver the Left Front tire is low. The second type the tires can be rotated to any position and have the computer reset on where the sensors are. Now some tires are directional and can only be one side of the car due to how the tire needs to rotate. 2 - Depending on how much life is left on the tires it may be time for four new tires. You can also run into issues with a low tread / bald tire and a new tire creating problems with internal gears in front and/or rear ends and transmissions (front wheel drive) as well as possibly creating a pull due to the size differences from a new tire and bald tire.
Try turing the key from off to run - not start - wait a few seconds then turn key to off and then try to start the truck. You might have a fuel supply / pressure issue. Cycling the key runs the pump to prime the system if it has completely bleed back to the tank it would take a few seconds to prime the lines and build pressure to start. That is a free way to test and see what you might have wrong and give you somewhere to start looking.
Why did you change the throttle position sensor? You could have a misfire on one of your cylinders or a semi plugged catalytic converter. How many miles on the car? Was your check engine light on when you brought the car to Oreilly's?
You can try and bring you key fobs to an autoparts store here oreilly's has a display stand to test and see if the fob is working. Do any of the bottoms work on the fob. In the past I have seen the battery holder/connections inside the remote come loose and just need to be soldered and I have seen the green board dirty where the bottom hit the board and just needing to be cleaned. Have you tried new batteries?
If the wetness is water it could be a plugged water drip tube for the HVAC unit. how often is the floor wet? Is it only when the AC or defrost is on?
Chances are you have a wheel speed sensor dropping off to fast causing the ABS to activate. You need a scan tool to determine which sensor is falling off to fast. GM - Chevy front wheel bearings have a common issue like this.