Start with furniture plans. Consider the functionality of each room and then decide what pieces you need and where they should go in each room. Probably also best to prioritize which rooms you need to finish first. And, as always, buy the best quality you an afford. Never a good idea to stock a place full of cheaply made furniture only to replace it a few years later. Depending on where you live, checking Craig's List might also turn up some quality furniture at affordable prices. Good luck!

While its empty, remove all wallpaper you don't like, replace flooring with a cohesive look from room to room. Paint if you are confident! Then, try and figure out how each room will be used and what you already own that will work. Be free to break up matching sets of furniture if you can use chairs or a love seat elsewhere. This would require a basic furniture space plan. Relax & enjoy!

Lots of contrasting styles present in your home....mod 60's light fixtures and shelving units, ultra traditional wall paper and borders, and an unusual fireplace renovation. Start browsing the wealth of photos on houzz to select a cohesive style for your home. With the bay window and charming built-in, I would envision an eclectic cottage style. Take it slow and complete one room at a time.

Get the rooms you want re-done into a 3-d modeling program and work with a designer that way. You can make lots of major changes in a short period of time. It is very cost effective. See how it's done at www.mdc3d.com and click "introduction to 3-D design"