It sounds like you want a one-stop approach to creating the elf ears and freckles.  You could get the freckle effect that you want by using brushes but the elf ears presents its own set of challenges.  It would be difficult to get a good result using brushes for ears because they would have been created from a set perspective which probably wouldn't match the picture you are applying them too.  You would be better off learning some techniques to create the effect that you want yourself rather than looking for a one size fit all approach.  I've included two links below to get you started.  One is some skin texture brushes to help with the freckles.  The second one goes through a number of techniques which will help you create freckles as well as other retouching methods.  To create your elf ears you could mask of your images normal ear and put it on a new layer and then use the liquify tool to warp it into the pointed ear shape that you want.  Using the techniques in the second link will also help in blending all the elements together.

BRUSHES: http://photoshop.digitalmedianet.com/articles/viewarticle.jsp?id=37427

TUTORIAL: http://www.alfoart.com/digital_photo_retouching_1.html

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