answer N2
lspci -v | grep AUDIO # tells which driver your card uses bu default
grep sound-slot /etc/modules.conf # tells which driver is used NOW
/sbin/lsmod # check if THE driver loaded
chkconfig --list sound &
chkconfig --list alsa #tells a few thing about alsa
aumix -q #checks if the sound ON
fuser -v /dev/dsp # tells which programme USES your sound card
N1
there are many ways to ran progs automatically
whith RedHat-like distros you can write a script with your commands and put it in /etc/rc.d/init.d/your_script
and then
ln -s /etc/init.d/your_script /etc/rc.d/rc5.d/S99your_script
(hope your def.run.level is 5
N3 - sorry no answer yet - I've never used a touchpad