A:AnswerNo.
You do not required any accessories to use this device.
You just need WiFi connectivity.
If WiFi signal is poor than use HDMI adaptor to boost reception of signal, and this HDMI adaptor is included in this fire stick.
A:AnswerI believe the problem may be with the strength / speed of the wifi signal that you have available. Is the tv that you have the Fire Stick attached relatively close to your modem or is it on another floor? One way to check would be to try it on a tv that is close to your modem and to see if you are getting the same problem.
A:AnswerI would recommend getting an antenna for your local channels. It is amazing the amount of channels and clarity you can get with an indoor antenna. That is what we do rather that paying for Hulu.