You must have one email id on any site not necessarily gmail to login orkut. Just type the email id and desired password in the username and password field. And it will ask you to join orkut. As simple as that
How 2 Create An Id On Orkut Without Creating Id On Gmail?
All google accounts use the same username and password. You don't have to use gmail if you don't want, but if you want to, just use the same password as your orkut account.
