No, they're very basic. It's all light-green or yellowish resin, that has to be assembled - but this being resin, there's quite some cleanup and filling included. If you don't have experience with that it may be difficult - and could be very frustrating (OR very rewarding). The picture on the box and books or websites should serve as a painting guide.
Unless it changed lately (it's been a while since I did this myself) even the assembly instructions are very minimal - you have to know what is what and where it goes - or again use other reference material.
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There is a theory which states that if ever anyone discovers exactly what the universe is for it will instantly disappear and be replaced by something even more inexplicable.
There is another theory which states that this has already happened.