This is a singleton pauper cube, save for the gold cards, which are uncommons to provide proper support across all guilds at a balanced power level. The archetypes are:

Azorius ETBs
Dimir Control
Rakdos Aristocrats
Gruul Caveman Aggro
Selesnya Counters
Orzhov Reanimator
Izzet Spells
Golgari Graveyard
Boros Tokens
Simic Ramp

There are no duplicates or functional reprints. Some cards do similar things (like Arbor Elf and Elvish Mystic), but if there is an exact effect you're looking for, you will only find it on a single card per colour and mana value.