lmao will someone please explain to me how to find out what my video card is?

my dad said it is an "internal" video card and has limitations because of that
i noticed that my grandma's computer, [older everything] can run 4 wows and fury no sweat, but my home pc refuses to open more than 2 pcs and cannot run fury

i am no tech guy . . . could someone refer me to a good video card? 100-200 dollars?