Your chicks are old enough to move right into their coop without any brooder or heat. You really should have a secure run for them until they get to a size they're not predator bait.
Your chicks will need to be taught to go into the coop from the run when night comes. It can take as little as two nights to teach them or as long as a week or more.
Once the chicks are comfortable in their new home, say, a week or so, you can open the entrance to the run so they can begin exploring the world beyond. It takes a week or so for chicks to get up the courage to venture out and they won't go far at first. But they'll return on their own without the need to train them. You may find it useful, though, to train them to come when you call them, easily done with treats and a verbal cue.
I wouldn't let them out to free range without supervision, though, until they're pretty much full grown so they have a chance if predators come around.