InDesign’s print dialog offers more information than you may first think.

here’s a screen grab of what your print dialog might look like by default — this one shows a tiled job previewed in the bottom left corner :

if you click on that preview you’ll be given some handy specs. particularly useful is the number of pages your tiled job is going to print on — something which is often hard to easily see in the first preview :

click the preview again and you get the last screen which can be useful if you’re using custom paper sizes or other media :

that preview also has an icon at bottom left showing the currently selected colour output mode :
Grayscale
CMYK
RGB
Separations