OK, so it's not perl... but if what you want is Un*x functionality on Windows, then install Cygwin and use the standard unix toolbox. BTW, Cygwin comes with perl ;-)

Does anyone know where I can find things like "counting the lines in a file",

wc -l

"print lines 5 thru 70 to STDOUT"

sed -n '5,70p'

or "print the second column"

cut -f2