The only number to worry about is the CGWR which is the total weight of the truck with passengers and the fully loaded trailer. If you stay well under that figure you will be fine. Toyota and Ford produce towing guides you can download as a PDF and see the specs.
Payload rating is often based on the tires that the factory chose to put on the truck and also includes a 150# passenger calculation. If the truck has a crew cab that holds 4 passengers there will be 600 lbs. subtracted from the "payload" rating for the pickup. This is only done with trucks and is confusing and never spelled out in the brochures.
If I had a choice between a Toyota and another make with similar specs I would always go with the Toyota. There is a reason why they have had the highest reliability rating for the last 5 years in a row in the USA. I have owned Dodge, Ford, Willys, GM, and Toyota trucks and SUV's and currently own a diesel powered GM truck, and by far the most reliable and trouble free vehicles were the Toyota's.