To elaborate a bit:
Normal ILS: you have the localizer in the end of the runway, and the glide path approximately 300m from the runway threshold, offset ~100 from the runway centerline.
TILS: everything is located at a single site, roughly equivalent to where a normal GP would be placed. I've never seen one in person, but I assume it's all mounted on a Scania truck or equivalent for rapid deployment.
Side note: there are also some regular ILS sites with offset localizers. Sumburgh on Shetland is a good example, where the localizer for RWY09 is located next to the GP antenna for RWY27. It's the only place I've seen a LOC and GP (and maybe a DME if memory serves me right) in the same equipment shelter. And you also have IGS systems like the infamous checkerboard approach to Kai Tak, or the really strange one in Innsbruck.