By tablet you mean a drawing tablet or do you mean an iPad or something like that? Because you say you want to hook it up to a TV. If you’re planing on doing a lot of sculpting, then a drawing tablet is recommended, but it’s better to start with a cheap Intuos one, then if you feel you love sculpting and you want to go pro, then you can consider a better tablet. For regular everyday Blender stuff, a mouse is more than enough, a 3 button mouse is a must in my opinion.