[MP2]

Loose indentation just means it's not indented properly. Each 'level' should be indented one level, so the opening and closing braces/brackets are aligned. This makes code easier to read:

pawn Код:

CMD:test(playerid, params[])
{
    function();
    if(condition)
    {
        foo();
    }
    else
    {
        bar();
    }
    return 1;
}

As for the fourth error, you already declared a variable called 'idcar' so re-name it and any related to it.