Real agents won't charge you an upfront fee to take you on - if they do, stay away - they're not legitimate. Also avoid agents who charge a 'reading fee' to even look at your manuscript. That said, there are many agents out there, and many smaller publishing houses, such as Wild Wolf (UK) and TWB Press (US) accept manuscripts that don't come via an agent.
Publishing them on HubPages won't get you an agent or a publishing contract. By publishing online, you effectively give away online publishing rights and ebook publishing rights. And these days, publishers won't take you on if they can't get access to all the rights there are - print, online, ebook, world etc etc.
You do also run the risk of having your work plagiarised - even if you mark it as copyrighted, unless you read every book in your genre that comes out, you may never find out your work has been stolen and then, if you do manage to get your book accepted, you could be the one accused of plagiarism even though the words are yours! If you can't prove you wrote them, no one will publish them.
For a start, look at the Artists and Writers Yearbook 2012 - it should be available in your local library or can be bought from Amazon, Waterstones etc. It will list literary agencies and publishing houses who accept your genre - then it's a case of going onto their webpage/calling them and finding out whether they are accepting submissions at this time. If they are, follow the guidelines and submit, cross your fingers and wait and see!