Also, you need soldering equipment if you are going to hardwire anything together. If you end up enjoying electronics, you will eventually need soldering equipment as some thing just should not be built with solderless breadboard.
Also for components and parts on a low budget:
Mail order mail order mail order!
Radio shack = good if and only IF you need a grubby part within the hour. as in gotta have it NOW! :lol:
If you can wait a few days, go online and get samples (usually free!) or try digikey.com, mouser.com. If you buy quantities, you get better price/part costs. Most companies offer samples either free or just shipping cost. And as already suggested, ebay is good too.
I have some doubts about how good of an o-scope you can get on ebay for a cost around $100. If you strike out there, PM me, I have some you might be interested in that I'm not trying to recover any money on.