Each player draws 4 cards and decides which of them he wants to buy to his hand. Each card costs 3 M€ to buy to the hand, and you may buy 0-4 cards.
The rest of the 4 drawn cards are discarded face down on the discard pile. There is no hand limit. If the deck runs out of cards, shuffle the discard pile to form a new deck and continue play. This phase is also skipped the first generation.