A:
1. Dunno. I just ordered a 32GB sdcard and that should be fine.
2. No HDMI or anything like it.
3. Its a 5MP - the camera is awful for indoor shots. Might be good for outside shots, but that is what your phone is for, right?
4. It is the real WIndows 8.1 OS - just like what is installed to laptops and desktops.