All iPads come with iTunes...it's there.
Check the restrictions on the device (you'll need the restrictions passcode)
Settings>General>Restrictions and make sure all are enabled
The iTunes icon could also be tucked away in a folder somewhere. To find it, you can restore your Home Screen layout:
Settings>General>Reset>Reset Home Screen Layout.
This will restore your Home Screen to default (restoring any missing icons), then sort your installed apps in alphabetical order beginning on the following page.