what time is closed metro from Guangzhou Baiyun airport to city line3

1.what time is closed metro from Baiyun airport to city line3,and Can I buy Yang chen tong metro card from airport,how much and can i refund money back of the card when i go back in next 3 day.
2.how much about airport bus to city east railway station(shanshui trends hotel in it),what is the line.
3.hoe much if i take a taxi from airport to east railway station.
thank you very much for each question