You sound fairly new to Daz so I thought I would give you a couple of basic points. And I am guessing as well you don't use poser additionally.

New content you find for Daz/Studio is almost always INSTALLED into you content folder . Program files/Daz/Studio/Content is where I install downloaded items for my daz studio. Importing files into Daz is a different ball of wax and generally only done for basic object files. Because of the way the files are set up you should then open Daz and find a number of file folders. If you have any studio only files they will be in a folder called ..well yes studio. Those are files in the daz studio format and when you start saving things yourself in studio those files will go down there. Most of the files you install in daz will be in a folder called content. clicking on content will give you several more files below that. Which ones you have will depend on how much you have. Some folders will show up as you add more content. 

You have the V3 base and she is turning up for you in I am guessing either content/figures or down in studio/people. I noticed when I did an install for someone recently that files didn't turn up where mine had a couple of years ago when I did my first installs so I can't be sure where she turned up for you.

Now when you bring v3 in she is bland. Really bland. To change the bland skin you need skin textures also know as MAT files. You can find loads of free ones for v3 here in the free section and around the web. Those files will be installed in Daz/daz studio/content if you did a standard daz install. Then when you look inside studio at contents you should see a pose folder and your new mat pose will be in there under what ever name the Creator gave it. Morphs.. those pose files that change the shape of the face and body probably will require an add on product from daz. So if they don't work don't be to disheartened. Also not all free products work as expected. Nature of the beast when the word free is involved. If a free product does not work or does not install properly it may not be your fault. Once you understand more about the program it is often fixable but for now don't be stunned if something you install does not show up properly in studio. It may be the free product.

Clothes you will usually find in a file called figures. Most are conforming which I won't get into deeply but after you "load" in the clothing future your going to need to go over to parameters and click "conform to v3" in the drop down list. The same deal with hair. Though free hair is less common than clothing.  Most clothes have some morphs to move it around to fit the character better after you pose her. The same is true for hair. Sometimes to find these morphs you have to select different areas of the figure in the scene tree. Just poke around some. You won't break it honest.

We have some of this elaborated in our blog as well as some other links to free products. 
http://calida3d.com/blog.html

Hope some of this was helpful for you and if you need any other help feel free to PM me here.
Lauren

www.Calida3d.com
Daz studio and Poser content creators