generally no, but someone could gift you a crate key...
you would need to buy it, so yes. also buying from the store changes you from F2P.
The action key is binded to "h" by default. You can change the key by going to Options > Keyboard
Team Fortress 2 is a great game that is free and is an easy install. Other than that I don't know of many games at all that are worth getting, without needing a CD key.
The default key to do this is the comma key. You can change that by going to your keyboard configurations in the options menu.
They are already unlocked. All you have to do is hit the , key and it gives you a list of the characters that you can choose from.
Team Fortress 2 is a team-based multiplayer first person shooter developed by Valve Software as part of the game bundle The Orange Box. It was first released for Microsoft Windows, Xbox 360, and PlayStation 3 on October 10, 2007. Following suit, it was released as a standalone title on April 9, 2008, and on June 10, 2010, Team Fortress 2 was released for Mac OS X. The PC and OS X versions of Team Fortress 2adopted a "Free to Play" model on June 23, 2011 with all revenue being generated from micro transactions in the In-game Store. After several months of closed beta, Team Fortress 2 was finally released for Linux operating systems on February 14, 2013.
On a normal server, you can't but there are modded servers that by binding a key you can build multiple things
When playing, in 'Options', select 'Keyboard' and then 'Advanced'. Check 'Toggle Developer Console'. The default key is the [~/`] (next to number 1)
Team Extreme Minecraft Launcher is the key.
If a foul is committed by a team, the other team can shoot from this line, at the top of the key.
To address dog crate regression, try gradually increasing crate time, using positive reinforcement, providing mental stimulation, and ensuring the crate is comfortable and inviting. Consistency and patience are key in helping your pet adjust to the crate.
The g key is for the taunt action. but if you mean the taunt audio, they need to be extracted from the team fortress 2 content.gcf file, you can use an application called GCFscape.