Hello to all at techtoolsi

I'm new here and I have a question?

I need to hook up my equipment the right way. I have a pioneer mixer 2 technics 1210's, firebox presonus soundcard, onkyo amp and a macbook intel. I use ableton live, reason, logic and I need to know the proper way to hook it up because I must have something wrong because I'm getting low or no signals in live or audacity or anything and it's bugging me out.... So I would first like to know how to connect the mixer, amp & soundcard to my mac so that I can record and listen through my home system etc. Any help would be greatly appreciated... If I get that correct I believe I can figure out the rest, if not I'll be back! Thanks in advance!!!