Attached Link: http://poserworld.com/

If you're willing to dump a bit more money in, you might consider a Poserworld subscription. There's scads of stuff on their site; have a look through the preview pictures to see if they cater to your needs. You can also search by category in the Freestuff here, which will save you some time. Do you have the Victoria Fantasy Dancer costume from Daz3d? That's the basic model. The picture shows an add-on for that model, a texture map set that you'd have to buy separately. If you bought that, you would just use the MAT pose files that come with the set to change the colours of the rendered figure (you might not see a change until you render). As for the transparency, that's in the 'materials' dialogue. There you'll be able to assign various properties to the models: object colour, texture maps, reflection maps, and transparency. Choose the material you want to make transparent, and move the little sliders that say 'transparency min' and 'transparency max' up. Don't worry if the model now has wavy lines or dots instead of the solid thing you saw before-- it's supposed to do that. You can work in 'cartoon view' if you need to be able to see it more clearly. Some files make use of transparency maps, for example on the eyebrows and eyelashes of models. These are black and white or grayscale images, and Poser applies the separate texture map to a greater or lesser extent depending on how black or white the shade in the corresponding area of the transparency map: all white, total cover; all black, total transparency. There are some easy-to-follow tutorials on this kind of thing in the 'tutorials' section here on just this kind of thing. Common uses of transparency maps are for hair, lace effects, netting or webbing, that sort of thing. Don't worry, it will all come together!