Problems with 2004 Toyota Sequoia VEHICLE SPEED CONTROL

My 2004 toyota sequoia at various times will stop accelerating away from a stop if the vehicle is asked to go up or down a slight hill. other times it does it will no prompting. you are left without power and traffic is oncoming and you can't move out of the way, or accelerate forward for 2 to 3 seconds. really is dangerous. it does not happen in 4wd. many people complain about this and have for years, thus, i have little faith in the government. the vsc on the car shuts the power off for reasons of its own. incident date below does not make sense for something like this that is ongoing. can't the government even design a proper form? *tr

Vsc trac, vsc off, abs lights have been coming on and off since i purchased the vehicle new in 2004. dealer could not find any problems over the years. last week lights came on and stayed on full time. abs system severely shook when brakes were depressed. dealership replaced master cylinder and brake booster system. cost was $1,200. warning lights still were present, and they were reluctant to let me leave the dealership with the problem still present. they decided that the booster was an "after-market" product and not properly communicating with the computer. dealership wants another $600 to swap the brake booster, but still no assurances that the warning lights will not come back on. this has been problematic since the day i purchased the vehicle. it appears that this is not an isolated issue with the sequoias and tundras. *tr