Hi

I bought this camera with plans to use it as a base for 4x5 franken-camera. It is very large, and I hope to be able to use it some time in the future for 8x10 or possibly 11x14. But that is in the future, and for now I would like to know what it is that I bought, and what is the best way of repair and/or restore it.

It consists of 3 sections
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This side has an ability to slide up and down, and sideways. Is this where the lens mounts or the back?
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The bellows are in a pretty bad shape in the corners. The middle section has a door on the side (you can see the hinges in this photo)
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The bed is about 3 feet long and at one end is broken
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I have a 4x5 back that I can attach to it. I would like to mount a 12" (~300mm) lens and primarily use it for portraits. So I am not as concerned about tilt/shift movements.
Now the questions :
1. What was this camera for and how old is it?
2. I do not see any way to focus and lock the front and back of this camera. Do I need to attach screw rod and some sort of locking mechanism to be able to focus it?
3. What is the easy and economical way to repair the bellows?

I am sure I will have many more questions. Thank you in advance for all your help.