You didnt realize it so far?
First give a proper topic title so as to get proper replies.
Just "help", "ubuntu", "linux", "pleas help me", "help me" etc are always avoided.
For sound, try to get the gstreamer codecs, google gstreamer codec installation on ubuntu
You arnt getting any sound, type alsamixer in terminal. unmute all channels using M key and use up/down button to increase/dec sound level.