Ninja points are the currency you earn in survival trial and spend for most ninjas in the ninja collecting scroll feature (some require moon/sun/group coins, so pay attention), they're slightly pinkish in color.

Renewing moon and sun has been answered here many times already, but once again, it requires you to earn 5k sun/40k moon coins during a given week. If you hover over the little flame in the top right corner of the box that gives you your current total it will also tell you for sure what you need (since some people require less than 40k moon for some reason).