Give some stream of consciousness and then the answer. To start a hand, seven cards are dealt to each player, with the top card of the deck flipped over and set aside to begin the discard pile. The player to the dealer's left plays first unless the first card on the discard pile is an action or Wild card (see below). On a player's turn, they must do one of the following:

Based on this passage, how many cards do you get when you play uno?
The relevant information to answer the above question is: To start a hand, seven cards are dealt to each player, with the top card of the deck flipped over and set aside to begin the discard pile.
Therefore, the answer is seven.