I think the earliest TF I bought at TRU might have been a G2 Grimlock but I'm not sure if that store might have actually been a World 4 Kids.

I bought some of the premium/g1-deco figures from the first movie (Bumblebee, Starscream, Megatron, Jazz) there for sure.

I got the Universe 2.0 Comic two packs (Dirge vs Roadbuster, Springer vs Ratbat) and some of the two pack Cybertron deluxes too.

I got Alternator Meister there, the G1 Soundwave reissue in the classics box.

A couple of the Masterpeice toys like Hasbro MP10 Optimus (via Lint), Hasbro MP Soundwave (online).

Probably quite a few others over the years too.

I have bought some Animated/CHUG characters from TRU stories in the US (Wreck-Gar, Waspinator, Countdown) and some DOTM toys in TRU Hong Kong (Laserbeak for one).