Hey, where can i set the descision height for the "minimum" call ?and where can i set the "approaching minimums" call?and one more question ... ^^ i dont know what the landing alt is? can anybody pls help me? thx :)

you need to arm the radio/baro minsand if not activated in the options in the cdu do that too ...

Manual, read it... mainly because you've paid for it and it is 99% identical to the real airplane's one.