Rookie with chickens...

We just moved to a farm that has a chicken coop in the barn. The barn is over 100 years old, so I assume the coop is 'old school'. By 'old school' I mean it may not be the most modern chicken friendly coop. The more I read on here, the more I think keeping my chickens in an indoor only coop isn't right. So what do I do? Do I let them run the farm all day and bring them in at night? If I do that, will I be able to catch them? lol I'm still too nervous to put them outside yet. I have them in the house, I've just fallen in love with them and am terrified something is going to happen to them. I do try to take them outside every day and let them run around the yard with my supervision. I have goats, and my goats know not to go too far. If they hear something that scares them, they head back to the barn... will chickens do that? I guess can anyone give me insight on what would be best and safest for my chickens. The barn does have huge doors that I open every day so they would still get sunlight and fresh air if they stayed in the coop. Thanks in advance for your advice on what is best for my chickens. PS we also have HUGE turkey vultures that have decided to take up residence on our property-another reason putting them out scares me.