A TT of that weight and length will have a loaded tongue weight way over your soft suspension SUV's max amount.
You're committing a common newbie mistake by focusing on the towing capacity and not the car's payload capacity.
The Sequoia will run out of payload capacity WAY before getting close to that 9600lbs number.
And that 9600lbs number is only if it has the factory tow package.
Figure 13% of the estimated loaded trailer weight for a loaded tongue weight.
My guess would be around 1200lbs loaded. Subtract that and the weights of the whole family and the weights of car cargo, from the number on the yellow door sticker. It'll say something like "Occupants and cargo should not exceed xxxxlbs".
