As of 2017, 0.66 ref is approximately 7 cents
A fricken Scrap
You get metal in TF2 either by trading or by crafting down the weapons you find
TF2 is free-to-play
You either buy them from the TF2 catalog or you get them in random drops. So far there haven't been any way to get them for free, aside from trading and finding them.
By either getting it from the tf2 random drop system, trading for it, or crafting it using a force-a-nature, bonk! and 1 reclaimed metal.
https://support.steampowered.com/kb_article.php?s=34da3898dc6966e863df1cf0e930c542&ref=9257-TUJL-7421 :] https://support.steampowered.com/kb_article.php?s=34da3898dc6966e863df1cf0e930c542&ref=9257-TUJL-7421 :]
About 0.33 to 0.66
Yes. TF2 is a GREAT game, and I recommend you "buy" it. TF2 is now free to Play.
Well, it's your prerogative to scam someone. You can buy scrap from websites that sell it, like tf2outpost, other than that you can craft, trade or have it gifted to you. As found on the TF2 wiki: "The only way to aquire Scrap Metal is to craft weapons or tokens together"
No, TF2 is not playable on a phone
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.
Its normally worth 1 scrap