Timmy is right.
use the search feature for each item and you will know more than the guys at the shop once you are done. and you will know what is in there and what was done. i dont know what tune ups cost, but the parts involved are not too much money. save and learn. if you need to buy some tools, the cost will be offset by labor costs saved.
BTW, you can use electrical contact cleaner on the MAF. just dont touch it with anything (Q tip, etc).
oil around the TB could be a few things. go get some gaskets and take the IAC (idle air controller) off. its the little cylinder on the front side of the TB. clean it out. it helps control idle. remove the air inlet tube off of the TB. get some fuel injection cleaner spray, open the butterfly and clean out stuff in there.
check the hose that goes from the oil filler neck to the TB. oil could simply be from a loose or split hose.
speaking of which, renew the PCV stuff, as TImmy mentioned.
all of this is so easy. i do a full tune up on every new car i get (all fluids, plugs, wires, filters, cap and rotor, pcv, belts, and so on. costs a hundred bucks or so, but it is easy and you know what you got and how to do it.
the search works better since they revamped things here. and we all would rather see you wrench on it yourself than take it to a shop. when you get stuck, post.
just my two cents.
good luck in any case.