“I have discovered that the Kobo e-reader can open protected (DRM’d) epubs from libraries. They are synced by connecting the device to a PC with Adobe Digital Editions installed. But as far as I know it has no TTS.”
The Kobo wifi has adjustable fonts and views but these can depend on the book that has been downloaded.
Laptop keys with brightness settings available as function keys
“Because with my dyslexia, bright colours give me a headache. I dull it [the screen] down so that I can sit at a computer for a lot longer… I get headaches when I drive at night, as well. I like typing on blue but when I print it out it remains normal like black text on white. The dullness prevents me getting headaches and I can concentrate for longer.”