I am fairly confident most dinosaurs did not have feathers. Only a select few small theropods in the line that turned into Aves, as some of these went on to fly, and some of them went on to just get big. Additionally with the skull structure and bone structure of the large theropods like Tyrannosaurus, feathers would be a limitation to cooling down at such massive sizes, similar to modern large birds have a quarter of the feathering of small birds, let alone even have downy (emus and ostrich), and they aren't nearly as big as what some of these theropods had, in much hotter and humid climates.
