Redoing my old room and I have a limited amount of stuff I'm able to do with it?

My dad and I live in my great-grandmother's old home (we rent from her right now) and it was built about 60-65 years ago. my room is the old formal living room and dining room- so I have three doors and a chandelier in my room. the dining room part I want to make into a study/music room/mini library (I own a ton of books) while the rest of room would stay as my 'bedroom part'.
The problem is that I can't buy any new furniture, unless it is like storage totes or something, but as far as my bed and dresser and stuff...I'm stuck with my grandmother's old stuff. I like them because they are all made of wood and I'm a country girl, so that works. I cannot do a lot of painting because my dad says we might move soon (he's been saying that for five years though...o.O) and it really isn't our house.

The dining room half has two walls separating it from the rest of the room with a door frame (no door though, just a cut out) that connects them and it has a door to the kitchen. I have a fireplace on one of the two main walls and on the opposite wall I have a large window about 10 feet long. I also have a front door and then a second door that goes into the hallway. I have crown molding, hardwood floors, and such, so I have a very good foundation.

I was considering doing something like a Tuscan countryside room, but I have a very modern side to me, but I'm also very traditional. for my study room/music room/ library I want it to feel like one of those libraries you would se n an old mansion or something, so very warm and inviting...but I want my room as a whole to reflect my very open, bright, an cheerful personality.

If it helps any, here are some facts about me:
I was born and raised on a frm and I have horses.
I love the Twilight Saga and my friends often call my Esme because I am very much like her.
I love anything Italian.
I'm very patriotic and wish to join the U.S. Navy.
I want to become an E.R. doctor.
I love to read.

I hope that is enough info to help everyone!

To make it how you want it, your gonna have to buy furniture. Just check out your local Salvation Army or good will for really cheap furniture. I've also heard of "free stores" run by churches and such.

If you want the dining room to feel like an old mansion library, you'll need tall bookshelves, and a big arm chair. the fireplace will really help the mood.

Does your front door have a screen? if so, keep the door open! the breeze and outdoor sounds will create a lovely country mood automatically.

Don't be afraid to freshen things up with wall paint. Keep the color in the lighter, neutral range, and it will be attractive to future tenants. Keeping good paint on the walls does protect them, so it's a good thing to do for the house.

You mention a front door in the room; is it the main entrance? if not, lock it, and go ahead and put things in front of it.

You can de-emphasize the "bedroom" aspect of it by dressing the bed as a daybed; you'll be able to add a lot of color/pattern/texture in the bedding and linen, pillows, etc.

To get a library look, you'll need bookcases... lots of them, and tall if possible. if not possible, look for similar shapes, paint them all to match one another, and line the room. Add art, plants, etc on top of the cases. look at thrift stores and home consignment stores, Craigslist, etc for wing-backs or other chairs, and re-cover them in fabrics you love.

Look for wooden bi-fold doors (louvered at least on the top half) and give them a new color with a glaze on top; position them to divide off a corner to use as a dressing room for privacy, add a mirror and lamp behind them, etc.

Can you use push pins? if so then get some very thin fabric of your taste (think: sarongs) and "paint" the room with color by pinning up large pieces of fabric.

Someone mentioned the Salvation Army as an option. Another option for good stuff is Craigslist. or Freecycle. People are always trying to get rid of things and if you look carefully you can find good quality stuff. also don't be afraid of garage sales. You never know what bargains you will find.

BTW: Don't knock storage totes. my bed stand is two storage totes draped with fabric. No one's the wiser and it looks great.

Redoing my old room and I have a limited amount of stuff I'm able to do with it?