In the case of a pdf file containing pages that are images; the current version of Acrobat Pro will automatically straighten all the pages, if you run OCR on them.

Pro will also allow the compiling of many files into one doc.

For something less costly than Acrobat Pro.
Get copies of Ghostscript and ImageMagick.

GS has a lot of tricks built into it. But you have to be willing to dig into the docs and learn the command line options.

IM has stuff in it to manipulate images and can convert .png to .pdf. Don't remember if it can convert multiple .png's to one pdf, but I'd bet that way. Again, it's all command line stuff.

edit: I'm pretty sure IM can split the tiff file into it's component images.