1) I read a lot ... like a novel a day...
Yep, that's a lot.
2) ...are the ebooks the same price as paper books?
It varies, especially by publisher. Sometimes a little less, sometimes a little more. In general, they tend to be roughly equal in priced to the lowest price version of currently available paper books (hardcover, trade, mass market paperback).
3) Is there any way to put books that you've already bought on the devices?
Not without either buying a new copy, or scanning the paper book.
4) What kind of books can be put on there? There's several series that I like and I also like manga and comic books.
Dedicated readers with B&W screens are best for novels, short stories, and other kinds of mostly text documents. What books are available as ebooks varies by genre and publisher. You'll have to check on the specific items you're interested in. Some people read graphic novels, etc. on dedicated readers. I doubt I would.
5) Also, what reader would you suggest for quick loading (I'm impatient) and storage? I don't need top of the line though, as I'm not looking to spend all my book money on something just to read them on.
I'd go with something that had an SD memory card or other kind of removable memory card. That's often faster than dealing with cables. Alternatively, the Amazon Kindle and a couple of coming devices can load directly over a built in cell phone data terminal.
If you want to get your feet wet, try reading on a smartphone or PDA if you have one. If you like that, you may want to invest in a dedicated reader. The reader will be more pleasant to read on for many people, although I tend to use both. My jetBook is good in well-lit areas; my PDA is good for dimly lit areas and also is more flexible in what formats it can read. My smartphone is with me a lot. They all have their advantages.
Good Luck,
Jack Tingle