People still receiving coin here? Airdrops each mounth or how often?
Adorable, really. You missed the OP, missed all the updates and clearly didn't even bother to check the website or use the google machine. Bravo!
If Ill buy coins, how many coins Ill receive every mounth / week eth?
The new distribution is now 1 million Eth every 12 hours provided you had Eth in your wallet on 25th December, 1998 at 00:00 UTC

i also want to ask you people how to backup my wallet from my old laptop. i have tried synchronizing the wallet from the phone with the one on the laptop but did not work the transfer of coins..what am i missing?
It's always worked without a glitch for me on PC, I've no idea about mobile. Have you updated your ByteBall wallet/client to the latest version?