combining new .org and old .com account

Is there a way to combine the .org and .com accounts together?

Follow this guide to transfer the content from your .com blog to your .org blog.

Or do i need to login in everytime with my .org account.

Your .com blog and .org blog are completely separate, so you’d need to log in to the .org blog to work with it.

And what should I do with my freshmfker.wordpress account? Can I link it to freshmfker.com account?

You can keep it around for fun, use the offsite redirect upgrade to direct visitors to your new blog, or delete it.