I haven't seen Kikyou for a long time, so I don't remember exactly what her shirt looks like, but for the pants, search for hakama. There are a lot of links available on here for different patterns/tutorials on making them, and for her the skirt type (there are both skirt and pants types, they look the same) would work fine. If I remember right, though, her top is pretty simple, so you should just have to modify a general kimono or kosode pattern. It may not even need any modification, but I don't remember exactly how the sleeves look.
-Kudou Kazahaya (Drug & Drop)
-Rose Tyler (Doctor Who)