"Toning" can be a general term and mean something different for each runner. So let's look at what happens to the legs when they are toned and general guidelines for getting it done. Will running tone legs?
Morning running gives you many benefits. You get peace for reflection and contemplation and can plan what to do for the rest of the day.
The best time for a workout is where you can exercise regularly. In the morning you have the time you need. Is running in the morning good for you?