How Long Do I Keep Baby Chicks Inside?

If there mother is with them, there's no need to keep them inside.
If the mother is not with them then it just needs to be an outdoor coop with food, water, and a low hanging dowel rod in the coop, so they can roost

Here is a page all about raising chicks ,you might have to read a little but it will answer your questions. Www.mypetchicken.com/ebook.aspx?Chapter=4