I don't know what toys you have, but my toys today are RC planes with a 25km range that transmit HD video so you can fly them with a first person view.
Dragonlink, Crossfire, or something else?
For radio it basically doesn't make sense to use anything other than ELRS any more, it's years ahead from anything else.
Generally, there are limits to how far you can go, but you can get a license and file flight plans.