The problem you are going to have is all that stuff will be background so you wont see it. What you want to do is a little tricky but I will give you some hints. I'm not on backtrack at the moment but I will show you the basics. There are a few ways to background and foreground a procces the most common is the use of the ampersand.
one & means "move on to next command before this command completes and
&& means wait until the current command is complete untill moving on to the next command.
What you want to do is a little trickier because I assume that you want to be able to look at the airodump shell in order to select your target variables. What you will need to do is spawn a new shell with the airodump command so you can select your variables. Im not sure how to do it with konsole which is the default shell for kde but I know every distro has xterm.
airmon-ng stop wlan0
ifconfig wlan0 down
macchanger --mac 00:11:22:33:44:55 wlan0
airmon-ng start wlan0
echo Enter The Mac to Crack
echo Enter The Essid Name Of User
echo Enter The Channel# Of User
xterm -e "airodump-ng -c $Channel -w $Essid --bssid $Mac wlan0" &
xterm -e "aireplay-ng -1 0 -a $Mac -h 00:11:22:33:44:55 -e $Essid wlan0" &
<next command here>