If server has sv_pure set to 1, you may get kicked or banned for custom skins.
You can use custom skins if that is what you mean. You cannot use multiple skins for the model at the same time.
Custom skins only appear to you, and do not travel over the network, unless you have used a hacking program which does so. Sites such as FPSBanana hold skins which, to my knowledge, are perfectly safe. It is perfectly legal to utilize custom skins over online systems. They will only appear to you, and no one else will ever know.
There are HUD skins and weapon skins that can all be found at gamebanana.com
obviously.
It is a custom font called "TF2." It also has the TF2 Medic and TF2 Build. Look on your tf/resource folder in Steam to get the fonts inside.
check on www.youtube.com and put how to put skins on team fortress 2 if your not allow on youtube go to google videos and see for your self
Technically, no, not officially. There are skins that you can download to change the Rocket Launcher and/or the Greande Launcher.
Yes. TF2 is a GREAT game, and I recommend you "buy" it. TF2 is now free to Play.
No, TF2 is not playable on a phone
TF2 is free-to-play
No you cannot trade weapons for beta tf2 to normal tf2. Beta Tf2 is considered to be a completely different game by steam. Therefore the two game's inventories are not compatible.