Your ETH address doesn't have any ETH, try to send a little amount like 0.01 or 0.005 ETH and that can be use as your GAS.
You have 250 POLY token in your account. at present it is not listed any where so you can not sell these tokens. It may be listed after some time and you may check it on the link--
For now Scrotal, akmittal is right. You don't have to think about the "GAS" as there's no exchange where you can send those POLY tokens you've got. Wait for it that an exchange will list it and then when its ready, put some ETH to your ETH address.