Finally I find a solution. It's not a completely satisfactory solution but it works! What seems to be is that neither alsa mixer 1.21 support well our sound card. What people do is to set in
/etc/modprobe.d/alsa-base.conf
is
options snd-hda-intel model=toshiba-s06
and reboot.
After run alsamixer and in capture screen you can select internal or external microphone.
What it's annoying is that you can't set separatly headphone volume level. But internal microphone works!