I have a Facebook page and it took me a while to work out how to use it.
Facebook has been going though and deleting 'inactive' accounts, although they don't specify what that means there is a lot of discussion on Facebook at the moment about this.
As for liking pages, I have my personal Facebook page and my business page. It took me awhile to work it out but you need to link the two pages to be able to use everything. You can only like pages using your business page after a personal page is connected to it. You then have a drop down menu in the top right had corner which allows you to swap from your personal page to business page and back. You can then like and comment away.
I have then connected my Etsy shop to Facebook using one of the Apps in the Etsy store. Here is my link if you want to go and have a look.
http://www.facebook.com/hopdesignsI hope that makes sense and let me know if you need any more help and I'll help where I can, its better than doing what I did and sit there for ages trying to work it out!