To your first question: no, these are new skins unique to this program, though chroma effects have been offered on other cosmetics before. However, there is currently no representation of the chroma effects. The closest you would get to seeing in-game representation is the glow effect on the geesuits shown in Video Update #12:
https://forums.em8er.com/threads/video-update-12-we-have-base-interiors-new-lore.1276/
The newcomer packs do not contain any of the cosmetic rewards/stretch goals of the previous funding programs. All cosmetics are unique to their respective programs to maintain the exclusive nature of these items. The only exception to this has been the Founder dropships, from the newcomer packs, that were offered as a free reward to all previous backers.
Other rewards such as the Vision Book PDF, name reservation option etc. may be recurring rewards across milestone programs.
If you are quite sure you have donated on previous programs, do check and ensure that you have registered the same e-mail you used on indiegogo, on the backer website. If you did donate, the packs should show up, as long as the e-mail is the same.
Last resort, you may contact
[email protected] to confirm the status of your backer packs.