Below is the unofficial checklist for Series 1. The ones in bold are the ones I have.

Captain America (with Captain America vol. 1 #109)

Hulk (Bendable fingers) (with Incredible Hulk vol. 1 #314)

Hulk (Articulated fingers)

Iron Man (with Iron Man vol. 1 #149)

Iron Man (Gold armor, "horned faceplate," Chase)

Iron Man (Stealth Armor, Chase )

Toad (with Uncanny X-Men #4)