Usage > F13 maybe it's easy this way for you 
As for a 2 color pdf, nothing simpler.
1. create you colors - you already have black, you have to create another one but it has to be or PANTONE or a pure color - magenta, cyan or yellow. You can use percentages of the chosen colors, eg. you can use 20% black if you like or 40% Pantone, no problem.
2. Build your page and when it's done, hit print.
3. Select printer Adobe PDF, and chose our desired settings.
4. On the "colors" options select Setup: Composite CMYK and Spot. Automaticly the plates you dont use in your page are removed.
5. Hit Printer button and in the Layout popup select PDFOptions and select your output on the Adobe PDF Settings - PDF/X-1a is standart for press. it Print, name your PDF and hit save. You'll be directed again to the print menu. Hit Print again and you're done.
Hope this helps