It was pretty easy.  She's a Barbie-sized doll, fairly common online, that usually retails for around 10 dollars.  The trickiest part was wiring her.  I purchased green and red 12 volt model train lights (that come attached to thin wires), cut a hole in the back of the head and slits in the eyes, then inserted the green bulbs into the head and ran the wire down through the back of the dress to the legs.  The red bulbs were placed on her chest and the wire was run down the other leg.  I was a little short on time so I simply taped the batteries (the small 12-16 volt ones for garage door openers) to the legs and taped the ends of the wires to the batteries.  I'm going to work on a battery case with a switch, as it can be difficult to make good contact with the tape.  I then painted the face black with enamel, fashioned a hood out of a strip from an old t-shirt, and picked small flowers (actually weeds!) from my garden for the bouquet (although this will be replaced by a store-bought one because the flowers wilt quickly).  The candle was a small nail with the head cut off and painted, with a dab of air-dry clay molded like a flame.  The hands do not grasp, so the bouquet was taped on and the candle was wrapped on with a wire and covered with a shred of tissue to simulate a kerchief.  She was stood up with a small metal doll stand (the one that extends from 3 to 5 inches).  

As for the attic clutter - I don't have a doll shop around me, and local toy stores only carry plastic, modern furniture.  You can get some nice furnishings online, but antique-style pieces are expensive (a love seat, for instance, can go for as much as $60)  I got most of the stuff at Hobby Lobby, although they don't carry a great deal of things for 12 inch dolls (also known as fashion sized).  I did find a top hat, glass-domed clock, pictures, mirrors and globe that were big enough.  I did find some great boxes, a vanity, a chair and a trunk in the unfinished wood and cardboard aisles that were the perfect size.  Ultimately I plan to construct a small diorama of the attic, probably the floor, roof and one wall.