Hey Zahid!
Unfortunately, the server is only accessible on bought and legal Minecraft accounts. I believe this is why you're unable to login, as TLauncher is an illegal and free way to launch Minecraft.
If you'd like to purchase Minecraft, you should refer to their website. But sadly, without a proper Minecraft account, you'll be unable to log on. My apologies for the inconvenience.
As a side note, if you were unaware, free launchers such as TLauncher do have the potential to give viruses, so I'd check to make sure that your PC is clean, and possibly remove the application as to prevent potential technically issues on your end.
Yet again, if you have any questions or need an explanation of something I just said, feel free to PM me or another staff member for assistance. Have a lovely day!