Why without raising engine and starting several times won't my car fire up? on 2003 BMW 745i

My car must be started several times raising the engine before it gets properly powered, else the "engine malfunction" signs comes on and it won't pull.

Asked by for the 2003 BMW 745i
scan codes and post so we can adv.poss dirty throttle body
Don't understand this instruction. Please simplify, I am not a mechanic.
1 more answer
Find a good BMW tech AND get references first if possible. Will save a lot of aggravation if you are not a mechanic!!