Thanks for clarifying.
You have asked about a lot of different effects that can be accomplished in many ways. Here's just a few.
I will assume you know what I'm referring to in my explanation, if not, ask.
Here's your black character on a layer.
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Here's the black character with a gradient overlay layers style.
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With the black charater layer turned off.
On a layer below the black character, I added a white character. (made from the same selection as the black)
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The white character with an outer glow.
I do these separately for better control, but these can be done with the same layer style you use on the black character.
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Black character layer turned back on combined with the white character layer below it.
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Black character layer with a Bevel and emboss layer style added.
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The variations of adjustment is almost incalculable.
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You can add pattern and color overlays to add texture.
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Do a Google Image search on
"Photoshop Text Effect Tutorials", and just look for any text effect that you like and visit the tutorial to learn the different methods of using layer styles!