Keychain password?

I just bought a brand new imac. Every time it is restarted, woke up, it gives me 20 or so little boxes that want my keychain password.I dont have one and I dont want one.
My last imac (2008) did not do this nor did I have one.
How do I get rid of all of the popups that want this password?

If you don't have anything of importance on this new Mac perhaps you should do a clean install.

Thanks, but I transferred all my data from my last computer.

Your Keychain password is your iMac password to access your computer pass the start up it is there for security and after you give the items permission they quit hounding you plus the benefits of accessing the passwords should you forget or it needs first aid.

Thank you!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!