To enable sound you need edit /etc/modprobe.conf and add model=toshiba to end of line.
This file should look like this:
alias eth0 r8169
alias scsi_hostadapter libata
alias scsi_hostadapter1 pata_atiixp
alias scsi_hostadapter2 ahci
alias snd-card-0 snd-hda-intel
options snd-card-0 index=0
options snd-hda-intel index=0 model=toshiba
More information: HDA - ALSA Wiki
