About keyboards...

Yo i need some tricks and i deserve it lol. There's some keys about lol i will ask all of them.So first question is wich key is attack closest shit in area its not 'a' cuz "a" is sucks u cant press the pink ward and blue thing on map and "a" make you wait a while wich key is not show you range and just make you auto golems.Second question is i watch teddy on stream he was playing jinx and press something that show you range and make u shoot this is not "a" or "x" too cuz a has a red sign in range and 3.auestion is why is tf blade press a all the time he is like press all the autos with a and he clear minions as irelia withouth even put the mouse over them.Press "a" can provide function with skills ? i dont think so but this shithead tf blade never miss click even if he around so many minions with enemy jungler and last question is about tf blade too.He will never miss last hit to minions.imagine there's a 3 minon wawe the all has different armor so he cant guess how mouch he's q will hit as irelia but he is flying on minions to hes enemy does he have a trick :D ? Thats it