hi i have ipod that i restarted but its keep on nagging about password and icloud email but i dont know my email or password

Have you forgotten your ID and password. If so: Forgot user ID: https://iforgot.apple.com/appleid#!&section=appleid

Forgot password: https://iforgot.apple.com/password/verify/appleid

OR

did you get this iPod second hand. In that case, you are facing Activation Lock an anti-theft feature and these is no way to activate your iPod. See Activation Lock for iPhone, iPad, and iPod touch: https://support.apple.com/en-us/HT201365