Will Terminal show a progress bar when I copy with “cp”

The short answer is no. The ls shipped with OSX is not the GNU ls therefore it doesn't have the same options.

But you can get a similar result with :

ls -al | sort -k1 -r

Ps: I agree that it's far from perfect :)

If you want to just have terminal open and run you can get an idea from below.

It is not very neat but works of sorts..

example:

on open myFiles
        set bigList to {}
        repeat with i from 1 to number of items in myFiles
            set this_item to item i of myFiles
            copy (quoted form of POSIX path of this_item) & space to end of bigList
        end repeat
     tell application "Terminal"


            do script ("for f in  " & items of bigList as string) & "
    do

    echo  \"$f\"

    done"

        end tell
end open