I like playing games without it completely once in a while. I'm not against direction in games, but a middle ground without yellow paint levels of obviousness is my favourite.
I got 5. But I think the hint button is busted. On the last one I had no idea, but tapped the hint button until it was all revealed and it counted as correct.
I like choosing a good username. So much so that I've probably changed my Gamertag about 10 times. I could have bought a new game instead. Though I don't really care what other people are called. So maybe it's just a waste of time to change mine.
I would check what resolution the TV is set at on your PC first. If you right click the desktop and click Display Settings. It should take you to a settings page, and if you scroll down to Scale and Layout, the resolution options should be there.
I don't know much about that. I think the TV would need to be switched on and probably the hdmi splitter with the TV selected for it to appear in the list.
You need to change the sound output to the HDMI. There's a speaker/volume icon next to the clock where you can choose the output device. But you do need to do it on the PC, maybe every time, I'm not sure.