I like your wall color. I wouldn't repaper the whole thing. Bathroom could look great in a grasscloth though.
What I think the place is missing is accent color, as everything is either cream or brown or grey like the bathmat. Change the accessories is what I would do. For example, instead of your many rugs in the living room, try one large area rug with color. Something like this:

In your bedroom, I can't see the rest of the bed, but if you don't have one, update with a great headboard and new comforter:

Visit your nearest art museum shop and buy a few posters you adore, then go to a big craft supply store and choose frames you like. As your budget changes over the coming years (and maybe your taste too), these can be graduated to lesser rooms.

If you like the wall color, I would update bedding and accessories. I can offer more suggestions with additional pics.

paint the walls white and rely on art and objects to add color. Don't shop for things to match your walls. You're going to end up with mud.

a big mural in the living room would defiantly make a statement

I would first say declutter, declutter. Then new and larger pillows for your couch, and a different curtain arrangement, just simple panels on the sides as shown. I love the glass and metal coffee table shown above. Paintings above the couch instead of the bland mirror would be cool. I'd pick something contemporary or abstract for a modern vibe, something unique and interesting. A tribal rug in warm colors with terracotta, blue, green and beige with throw pillows that match would be great. I like your wall color, but right now your rooms don't really go with it.