The answer might depend on what computer you want to use. Check your OS against the system requirements of the versions that are available.
The current version is CC. You can't buy it outright. You pay for a subscription to Creative Cloud and get the suite of Adobe software. I think you can get a subscription for InDesign alone, but to create catalogues and brochures, you'll probably need Photoshop, Illustrator and the small matter of a few years experience using the software, of graphic design in general; composition, typography, image adjustment, pre-press and a plethora of skills required for completing such a task to an acceptable standard. In all honesty, you're probably way out of your depth, and hiring a professional would be by far the better option.
Which instrument should I buy to write an opera?
If you do wish to proceed I suggest you get some training. Personal training is probably the best, but the most expensive, such as that provided (in London) by http://www.certitec.com
There are a number of books, such as: http://www.amazon.co.uk/Adobe-InDesign-Classroom-Book-Release/dp/0133904393/ref=sr_1_1?s=b ooks&ie=UTF8&qid=1415277968&sr=1-1&keywords=indesign+CC
And excellent online trading from:
Train Simple: http://www.trainsimple.com/CourseDetailUser.aspx?id=112
And, of course you can ask specific questions on this forum.
By the way, start with something simple, such as a leaflet, not a catalogue!
Thanks for the feedback! I'm also in the process of hiring someone who's already proficient with InDesign and photo shop but I want to learn myself as well. One other question: I use a PC at work and a Mac at home. I'd like to be able to work on this both at home and at work, do I need to pay for both versions of the software? Thanks again for any feedback.
Creative Cloud allow cross platform installation and activation. Perpetual
licenses do no.
Your best bet when working across platforms is to only use OpenType fonts, and if you use Pro versions, even better.