Problems with 2006 Toyota Tacoma POWER TRAIN

I purchased a toyota tacoma 2006 new and from day one had problems with the vehicle over revving on start up, which is very damaging to an engine in cold climates. it also between shifting from 3rd to 4th, and 4th to 5th gears the rpm's will not come down to enable one to shift properly and not only makes for a road dangerous condition but it also causes damage to the entire drive train. i've been unsuccessful at trying to take care of this problem with toyota, quite frankly they have a very bad attitude with this whole matter and to give you an example, i was told by one dealership that maybe i should learn how to shift faster. please assist me . *tr

Engine rpm hangs when shifting from 4th to 5th gear,clutch has long delay to engagement in sub-zero temp. dealer says these are normal. *jb

Dt: the contact states when starting the vehicle in the morning the idle was high. it took approximately one to one and a half miles of driving for the idle to return to normal. the accelerator pedal stuck. when shifting from fourth gear to fifth without foot on the accelerator the vehicle accelerated on its own. she stated that fourth gear could not be used. the vehicle must be shifted from third gear to fifth gear. the vehicle has been to the dealership twice, and they stated the computer was learning. the manufacturer was contacted, and they agreed with the dealership. therefore, no repairs have been made . *ak updated 01/25/06