Yes, you can do it in in Pro OR Make...
But you need to install the STL import/export Extension.
Available from the Extension-WareHouse...
https://extensions.sketchup.com/en/content/sketchup-stl

There are some additional 'Solid' tools only in Pro, but you can do all of their operations 'manually' in Make if you need to - it just takes time and thought...
There are also some Plugins which mimic some of these 'Boolean' operations, which you might find helpful...

There are many threads in the SCF forums discussing the many various aspects of 3d-printing.

You will need to make your object a 'solid' - so learn how to check for and effect 'solidity' in groups/components.

Something else to keep in mind is the 'size' of your object.
SketchUp's built-in tolerance is 1/1000".
This is fine for all things relating to buildings, but once you go down to tiny geometry in small objects [as you might want to 3d-print] it can result in missing tiny edges and facets in some operations, destroying its 'solidity' [SketchUp assumes that the two ends of an edge closer that 1/1000" are coincident are]. These are processes like FollowMe, Intersecting and similar work by 3rd party scripts where potentially tiny facets could be created/attempted.
There are well tried workarounds - e.g. making the object a component, scaling a copy of it x1000 and doing the risky operations inside that. Those changes will also replicate OK in the smaller version: delete the blown-up version when you are done.

Learn to use the forums' Search tools - there are dozens of helpful posts...

You don't apply materials to an image (which is a texture itself). And the side wall textures are part the Match Photo image, they aren't a separate texture. What you might do is create a new material that looks like them and apply that to the faces in the model. In GIMP I have sampled, warped part of a Match Photo texture and applied that as a tiled texture in a model (don't tell anyone). But you might just start with a new wall material and adjust it to match the color and texture in the photo.

In your Match Photo scene, Use the Style window, and edit the style. Go to the "Modeling" tab (last blue one) and turn off the foreground photo under "Match Photo". That will show you the materials you've applied to the faces while in the Match Photo scene. If you want to project the photo onto the model faces, Dave has done that, I think.

I think I may understand what you want.

I am assuming you have done some Match Photo before but have not used all the features?
You did not mention setting the scale of your grid and adjusting the grid to fit the real world scale of something known in your Photo. That is necessary.
Once you have completed adjusting the axis you need to use the "Sketch Over" function. So you sketch over your main surfaces, then project the photomatch photo onto the surface by clicking on the "Project Photo" button in the Match Photo Dialogue Window. Now you are able to model more of the details from these surfaces or add new ones. You will be able to paint new materials onto the individual surfaces you create. If the new material-photo doesn't fit properly you can use "texture-tweaking" to pull the perspective out of it and fit your modeled section. This is a quick and dirty explanation and if you haven't done this before, you will likely need more detailed explanation. But I believe this will get you what you want.

Hi annken,
I think is 'over there' 👍
http://code.google.com/p/cutlist/downloads/detail?name=cutlist4.1.4.zip&can=2&q=

Try this
http://forums.sketchucation.com/viewtopic.php?p=284829#p284829