1 - No you can't bid for any player you want from any team, it's work just with 5 stars player who will be a 6 stars player by winning 1 point .. and you can't choose a player from your friends team .. the list is updated automatically.

2 - No you will not loose your tokens .. it's written that if the manager didn't accept your offer tou will receive back all the tokens you bid for the player .. it's not like the other kind of bidding whan you loose your tokens without getting the player.

3 - you can't put a player in the negociation list by yourself .. it's done automatically when your player will be a 6 stars by receiving 1 point ( for example i'm on level 4 now wich mean that my 5 stars player has 39 .. if one of my pkayers has : Defense (39.8) / Attack (40) / Physics (40) .. that mean he will be a 6 stars player when he reach 40 in defense .. that player will be automatically put in the negociation list but you will not see it until you receive an offer for him .. !!!