[Ironboy]

Your first question..
1.if you did anything like this ..

pawn Код:

public OnPlayerRequestClass(playerid, classid)
    {
    switch (classid)
    {
        case 0:
        {
            SetPlayerPos(playerid, 1541.1511,-932.8580,43.1303);
            SetPlayerFacingAngle(playerid, 4.9192);
            SetPlayerCameraPos(playerid, 1540.8115,-926.4645,43.0597);
            SetPlayerCameraLookAt(playerid, 1541.1511,-932.8580,43.1303);
        }
    }
    return 1;
}

then add this..

pawn Код:

GameTextForPlayer(playerid, "~g~~h~BMXer", 1500, 6);

you can change "BMXer" according to your wish

Your second question
2.Use gTeam and make commands for each team.
here is the samp wiki for more informations
https://sampwiki.blast.hk/wiki/PAWN_tutorial