Zuk's1287271010

I have the Pioneer AVIC-F500BT. I am with some problems on my device tought... the voice regonition doesn't work at all and the sound is too low comparing with my pioneer stereo sound! I live in Brazil, so I need this kind of stuff on mine. I want to put Brazil maps... I have also the Tom Tom 750 with Brazil map. Could I use it on it? How everything works I am new on this stuff! I just want a help with does anybody can help me I appreciate! Thanks you guys!