Make sure the text layer is unfrozen/unlocked and click the 'Numeric Edit' button on the left tool panel. The mouse cursor should have a small box next to it, then click on the text you want to edit. This should open the 'Edit Text' window. In the 'Properties' settings you can change the font, size, and alignment.

If you want to change the text color you need the 'Edit Properties' button right above the 'Numeric Edit' button.

I don't know why the buildings look different. Here are the settings I used.

Feel free to check out my .fcw file if you want to see how I did it.

Wow looks great so far, the neon style is cool!

I pretty much did what Loopysue said. I used the CDC3 Cyberpunk building style and only decreased the bevel size from 10 to 5. The districts are flat colored polygons on a sheet with Blend Mode: Multiply; opacity 60%.

I used this map as additional reference for street layout: