Make sure this equipment can do what I want (infrared decoding)
1 - You'll go blind trying to read that scope. It only has 128 pixels horizontally, which is not nearly enough to resolve the codes you'll be looking at. What you may find more cost-effective is a logic analyzer. At a guess, this should do you: http://www.amazon.com/24Mhz-Channel-analyzer-Saleae-Compatible/dp/B00C0Q5NOU/ref=sr_1_2?s=pc&amp;ie=UTF8&amp;qid=1398100701&amp;sr=1-2&amp;keywords=logic+analyzer You connect it to a PC and use the PC monitor as the display. In this case, I suspect you'll have to go to the manufacturer's web site to get the software for it.

2 - The demodulator you've chosen is a bare, surface mount chip. Lots of luck trying to connect to it. You'll have more luck with http://www.amazon.com/Velleman-IR-Demodulator-Sensor/dp/B001M1991W/ref=sr_1_2?ie=UTF8&amp;qid=1398100978&amp;sr=8-2&amp;keywords=ir+demodulator Also bear in mind that this will only work for 38 KHz emitters. Granted, that is far and away the most common frequency used - but it's not guaranteed. Although, for $1 (plus shipping) you won't be hurting too badly if it's the wrong type.

3 - You'll need some perf board to mount your detector to, and a power supply for it - minimum 5 volts at a few hundred mA. You'll also need some clip leads to connect the demodulator to the power supply.