Several questions
 

I've mounted shared folder from windc to virtual debian machine. Until i decide to reboot the system everything was fine, but upon restart the content of mnt folder was lost(just in case im doing mount -t cifs //servernetbiosname/sharedfolder /myfolder -o user=domainname/domainuser). Is it possible to mount forever ? Also im using gnome, changing keyboard layout hotkey combo through interface and it doesnt work(none of several i tried), if i manually force the layout to the top of the list it works, so fonts are obviously fine. And at last, from what i got its not possible to add a shortcut on my mnt folder(or any) to the desktop in gnome right(only works for applications) ? Only possible option i found is to bookmark this folder. Please correct me if im wrong.

Yes. Add it to /etc/fstab. Basically you can add a line like:
Check man fstab for more info.
Not using gnome myself, but I guess you can add an application launcher and put this on the command field:

Yea, those solvations you mentioned works pretty well, thanks. But what should i do about keyboard layout hotkeys ?

check out this link it might help: http://www.malcolmhardie.com/weblogs...out-in-debian/

Ye, ive done that. Even chosen my very actual keyboard type in settings for the 1st time on any system in my life. But still the same.