facebook accounts

Hello! I wonder if it is possible to delete an old facebook profile where I forgot my password and can not register for quite a long time. Will he ever be (after a certain time) shut off if no one is reported? I do not think so but I'm not so sure. Thanks in advance.

I'm still learning about a lot of things and was wondering if it is better to have one Facebook account for your personal stuff like for family and friends and have another separate account for business and internet marketing. What's the best way to go for this?