I cant hear my mic and music at the same time I cant hear myself what should I do for the input, outputs?
Why do you need to?
Which version of Windows?
What sort of microphone and how does it connect to the computer?
How are your headphones connected to the computer?
Do you know what sort of sound card you have?
Start off with a read of this set of tutorials from the manual: http://manual.audacityteam.org/o/man/tutorial_recording_multi_track_overdubs.html