So as far as disposing of oil, just about all oil change places will take your oil free and you can talk them into taking the filter. Also like many other have said, changing oil is very easy as long as the engine is cold. I work at a quick lube so I can do it real fast. Oh ya and air hoses as long as they are the spiral yellow type wont scratch the paint, as long as it isn't dragged along.
I'm not sure if you answered this already, but what type of car do you have? If its a mercedes, BMW, auidi, VW, infinity, nissan p/u, toyota, and some other misc. cars/trucks, then it will be harder than just jacking it up, pulling the drain plug and pulling the filter. It will either require a lot of rags to soak up the oil and/or a lot of clean up, removal of a skid plate, or near impossible to get to filter locations. Also I would recomend a better than regular oil, like either a maxlife (over 75k) which is great for small leaks (it really works for sealing small leaks) or a full synthetic (under 100k or so with no leaks) which will extend the life of your engine while giving more hp (not much, but some). The reason for full synthetic for under 100K with no leaks is because it usually will make leaks worse or with really high mileage, the sudden change will cause leaks. And one of the most misuderstood thing guys that come in think is that a heavier weight of oil will last longer, it will not!! It will break down in roughly 3K, depending on driving cond. and driving around town vs driving on the highway, town is more harsh than highway. The best deciding factor to change oil is by pulling the dipstic and putting it on a paper towel, its obviouse whether or not it needs to be changed. And lastly when putting the new oil filter on first clean off the filter holder thing (not sure what you would call it) mainly the surface that the rubber part of the filter will touch. Then you wanna put new oil on the rubber seal of the new filter. And to drain it thouroghly after it is all drained leave the plug out and put about a half a quart or so through the engine.
I think thats pretty much everthing, sorry for the length and it being so unorganized.