A:AnswerIt has a M.2 which I used for a ssd (128GB) and use as a system drive to speed it up. Very slow out of the box. SSD really helped especially since they are so cheap now, I only paid $40 for the 128GB.
A:AnswerThis tower will connect to your monitor without an adapter if the monitor has either a VGA port or an HDMI port. Yes, your other peripherals will be compatible.
A:AnswerYes, this computer will connect with a TV, preferably with an HDMI for better quality picture. This computer will connect via-WiFi, just make sure your WiFi signal is far enough to reach it depending how far the computer will be, otherwise invest in a WiFi-Extender.
A:AnswerI don't see a way to install additional fans. Fans are for cooling the system not keeping dust out. I have found that a regular vacuum cleaner and or a can of air takes care of dust.
A:AnswerOnly with an add-in graphics adapter (GPU). It would have to be purchased separately and added to one of the internal slots. This would be true of most computers, unless a GPU has already been added.