I mean you could put it on the floor, but its more of a tabletop model. If you have the room to put it on the floor and lie down next to it listening to your music, you could.
#2 Can you have audio out via bluetooth or is bluetooth only audio in?
Bluetooth is only audio in, it functions as its own bluetooth speaker
#3 If I got a wifi receiver to put internet radio on this thing; could I?
If your device has a headphone output, you can use a male-to-male auxiliary cable to plug it into the auxiliary input on this unit to play your internet radio.