To install xfce on freebsd , this what must be done . First switch to root :

$ su - 
# switch to root , and enter your password . 

Next install Xorg :

$ pkg install xorg 
# install xorg 

Next install xfce :

$ pkg install xfce 
# install xfce 

Next , edit the /etc/rc.conf file and enable hald , moused , and dbus :

$ edit /etc/rc.conf
# edit the the /etc/rc.conf file .
# add these lines . 
hald_enable=" YES" 
moused_enable=" YES" 
dbus_enable=" YES" 
# Press CTRL-[  for escape menu , 
# followed by : a 
# to leave the editor ,
# followed by : a 
# to save the changes . 

Next reboot your system :

$ shutdown -r now 
# to reboot the system 

After reboot , login as regular user , and issue the following command :

$ echo ". /usr/local/etc/xdg/xfce4/xinitrc" > ~/.xinitrc

If other users exists , they must do the same .

Now to start xfce , just type :

$ startx