Why my car idles rough and will not accelerate?

What is your question?

Check Engine Light ON -"VSC" Light ON -"TRAC Off" Light ON -Hard idle. (Feels AND sounds like the engine is sputtering/dying) -The ability to shift gears, BUT cannot rev the engine past 3000RPM (Very gradual acceleration). -When revving the engine past 3000RPM, your engine sounds like a lawn mower and goes back to idle speed (When in neutral or drive or park). -When starting the engine, it revs up to 3000RPM for a second or two and then remains in a hard idle.

What makes this problem better or worse?

problem is constant

How long has your 2005 Scion xB had this problem?

months