Can you get 1 dollar for free on steam?

Sell some trading cards you may have in your inventory, some of them are worth $0.10+ you may even have some that are worth $0.50.

The only way to make money on Steam without paying money is to play a free game that has Item Drops (like Team Fortress 2, or possibly Dota 2), and/or which has trading cards, and then selling the items and cards that drop.

Nope

Sell trading cards.

Buy the key off a key reseller like G2A.com it's far cheaper.

Kill yourself please