Matching load capacitors to crystal
Yes, a 32.768 kHz crystal is often referred to as a 32 kHz crystal. I think it's rather sloppy personally, as it only costs another 4 characters to make certain of avoiding any potential confusion.  
Yes, they will all work. Unless you need the frequency to be absolutely spot on then e.g. 22pF will do. 
If you look at the notes in the datasheet it says they are for design guidance only, for exact values consult the crystal manufacturer. So the crystal datasheet is the one to go from.  As Endolith says the microcontroller doesn't affect the correct load capacitance value (well maybe a tiny bit with the pin capacitance)


I agree with Olin that the 16F84A is an antique - if you grab one of the newer PICs you will give yourself far more options. The PIC16F1828 is a nice part, internal RC/PLL up to 32MHz and loads of nice peripherals. Probably won't be much more than the 16F84A, may even be cheaper.