Guys, I am overwhelmed by, and very grateful for, your advice and generosity. I hope to pay it forward once I've got some experience under my belt and grease under my nails.
I had figured that I needed a bunch of stuff from a typical mechanics socket set and that buying the pieces I needed individually or in smaller sets would end up costing as much as, or more than, a typical socket set. Using the Craftsman 309pc set for $200 as an example (since it seems the overwhelming majority in this thread favor this set over the Kobalt 227pc set for $100), I was thinking I'd need the 3 ratchets, the extensions, a bunch of metric sockets for each ratchet (shallow and deep), the ratcheting metric combo wrenches and the smaller metric combo wrenches. And I figured it would cost me almost $200 to buy all those, and certainly more time, so why not get the full set, even though the rest of it will just be filler or duplicates of tools I already have.
But it seems this assumption may have been unwarranted, either because I can get the same quality stuff I need for less than the cost of the set, or spend about the same amount, but get better quality stuff that I'll need instead of spending on filler. And I am not at all a stickler about having all my tools come from the same company. But at the same time, if the set works out to about the same as, or only slightly more than, getting the needed components from the set, I'd rather just get the set and save the time of looking for and purchasing individual pieces.
Per 930dreamer's advice, I'll start by taking stock of what I have:
-Kobalt Double Drive ratcheting screwdriver w/ flexible extension, a few nutdriver bits, several screwdriver bits and torx bits
-Kobalt 4pc locking pliers set (haven't opened it yet, but it was only $10)
-2 Craftsman medium flathead screwdrivers
-1 Craftsman medium Phillips head screwdriver
-small hammer
-mallet
-metric hex key set
-SAE hex key set
-small adjustable wrench
-Stanley medium adjustable wrench
-small Craftsman wirecutters
-small Craftsman pliers
-needlenose pliers
-mill ******* file
-wire strippers
-3/8" drive beam-type torque wrench
-1/4" drive beam-type torque wrench
-soldering iron
-Dremel rotary tool
I think that's pretty much everything, aside from (seemingly to me) non-auto related tools like a scraper, mini-hacksaw, and carpenter's square.
Tomorrow, I'll go through the SnapOn Honda list CoryZ linked to (and yes, I understood his intent, and I'm not flagging down a SnapOn truck) and see which tools I'd need, though to be honest, I'm not really sure which tools would be necessary for which jobs, so I'll rely on plierwire's list of tools by task (i.e., oil change, tire rotation, spark plug replacement, etc.) and blarf's list (thank you both very much for taking the time to put those lists together!). To get started, I'm only looking to get the tools necessary for routine maintenance tasks. Anything above and beyond can wait until I actually tackle more complicated jobs, and that will only happen if I can make friends with people in the area (new here) who wouldn't mind me working on my car on their property (maybe I can do routine maintenance on their car as inducement!).
Thanks again for all the input and advice. I'll have to read this thread through a few times to absorb it all.
