When Starscream put their personality chips into WW2 era vehicles they said they hated these new bodys.Was it ever revealed in the comics or any other media what they looked like before they were imprisoned on Cybertron?
shareNo, not in the cartoon. In the War Within Cybertron comics, only Onslaught's and Brawl's Cybertronian forms were ever officially shown. They do show them officially in Fall of Cybertron Video game. Here's some of the designs...
Onslaught
http://tfwiki.net/mediawiki/images2/6/6e/Onslaughtwarwithin.jpg
Brawl
http://tfwiki.net/mediawiki/images2/1/1a/Brawltww.jpg
No official designs for Blastoff, Vortex, and Swindle, though, I only have fan art images...
Blastoff
http://tf-seedsofdeception.deviantart.com/art/Blast-Off-tech-specs-198 031960
Vortex
http://tf-seedsofdeception.deviantart.com/art/Vortex-tech-specs-198325 853
http://browse.deviantart.com/art/Charachter-Study-Vortex-81463812
Swindle
http://tf-seedsofdeception.deviantart.com/art/Art-for-Swindle-19164418 1
http://tf-seedsofdeception.deviantart.com/art/Art-for-Swindle-alien-ca r-189976986
Brawl is defo the Mammoth Tank from the Command and Conquer series...
I taught you everything you know, but not everything I know.