It really depends on what type of experience you desire. As far as just getting access to Android TV features, you could just get a Chromecast. If you want to step up performance a bit, consider the Mi Box: Mi Box - Android 6.0 TV Box
Both of these are secondary devices which connect to your TV and may require their own power outlet nearby.
Well, to tell the truth you can not. You`d better purchase some IPTV box for that. I prefer boxes MAG from Infomir. These tv boxes manufacturer is very reliable. MAG works pretty well for me actually. My co workers have the same boxes and have no regrets about is at all. Great design, high quality and durability. Highly recommended by the way