I started wrenching on lawn mowers when I was ten, using my dad's really basic SK 1/4" - 3/8" socket set (only had a 1/4" driver handle, not even a ratchet).
When I was in junior high, I bought my own 88-piece Craftsman set. Every year during the (now-defunct) annual tool sale I bought additional pieces to expand the set. Then I also added tools from yard and estate sales (and now from CL but I have just about everything that I could possibly need and need to start thinning down the extras).
Here's my advice: as others have said, stop buying tools and get to work!
You'll quickly find out which tools you really need, and those that you don't. You'll figure out that you need things like certain length extensions (that 1" one seems useless, until you come across that one situation where you absolutely need it), wobble-drive extensions, and so on. You'll figure out which tools you can go cheap on (rubber hammers) and which you can't (universal joints, wobble-drive extensions).
You'll also figure out which tools you use that don't work that well. You'll decide that the fixed-head 3/8" short-handled ratchet really doesn't get used that much, and pick up a flex-head stubby and a flex-head long-handled version of the same. You can flex the head 90 degrees and use the handle as a poor-man's speed wrench. You'll figure out that the full set of nut drivers take up way too much room in your box and start using a 1/4" drive handle with your existing 1/4" sockets that are already in your box. Stuff like that.
You'll figure this stuff out by actually doing the work and figuring out what works best for you. Most jobs will probably only require a dozen separate tools if even that.
My 'go' box that I work out of 99% of the time is a metal (not made any longer) fishing tackle box that weighs under 20lbs. This has both 1/4" and 3/8" metric and standard sockets up to 7/8" / 21mm, standard box-end wrenches up to 3/4", and all of my other tools such as ratchets, extensions, pliers, punches, hammer, torx bits, allen wrenches, screwdrivers and so on. I carry a rack of metric combination wrenches with this (8-21mm). Then add a rack of deep-well 6-point 1/4" and 3/8" sockets as needed.
When I was young I did a lot of junkyard hunting. I was carrying a 100lb. toolbox out there and that got old really quick. I whittled it down to what is described above and now keep a larger box in the rig and go back and get anything from that as needed.
Like I said, start DOING and you will figure out most of this on your own. It's not rocket science. You'll figure out what works best for you. If you get into a job and get stuck, THEN you know exactly what tool you need (or at least know that what you have isn't sufficient) and can go after it.
That's my $.02