I want to know what chain stores such as Best Buy majoir other in or around Ohio youngstown I can buy materials to install speakers, CD ect. For my car.

I was yelling Plymouth 95 (please hold laughter:) and want to know who.

Search for "Car Audio" in whitepages.com for Youngstown. It may be a small shop, but they may work better. What they try to sell you looking for in price. www.crutchfield.com. Certain products to ensure that it is at least competitive with retail prices.

I want to know every component that makes for a good sound.
I want to know everything from subs, tweeters, speakers, amps, altenators,....what am I missing?

A complete system will generally have all of the following.

*Speakers are a very vital part of how an aftermarket stereo will sound. You can have all the money in the world invested in your stereo, but if you don't have quality speakers than it won't sound any better than the factory stereo.

There are various types of speakers you can choose from, most common being "coaxial" and "component" sets.

Coaxial sets have a woofer, which produces mainly the mid-range bass frequencies such as male vocals,toms,floor toms,etc.They also have a tweeter, which produces the high frequencies such as cymbal crashes, snare drum,hi-hat,etc .
Coaxial sets come in a variety of setups such as 2-way, which has one tweeter for mid-high frequencies and high frequencies and one woofer for mid-bass. 3-ways which have one tweeter and a separate mid-high range tweeter and a woofer. Anything more just has a higher number of tweeters, which to an extent will result in a better sounding speaker.

Component sets consist of one woofer and a separate tweeter for various mounting applications. Some people prefer a separation of the mid and high range frequencies and theses speakers make that possible. Even if you don't prefer the separation, the overall sound quality, I think is much better than coaxial sets.

*After market cd players range in price anywhere from $50 to over $2000. Some of the base models will not have all of the features need for hooking up an amp and proper sound adjustment. Look for a cd player that has preferably 3 sets of RCA output jacks. RCA's carry the music signal from the cd player to the amp. Of the 3 sets, one is for the front speakers, one for the rear speakers, and one for the sub. If you purchase one that has 3 sets of RCA outs, it'll also have all the necessary features to adjust the audio settings accordingly.

*Subs and amps.Again, various types. Subs come in various RMS ratings and various numbers of voice coils. RMS is the total amount of power that the sub is able to handle continuously. When choosing subs look for RMS watts not peak or max watts. Amps come in different numbers of channels and RMS ratings. Channels are what your speakers or subs are connected to to receive the audio signal form the amp. Amps come in various channel setups from one channel up to four or more. One channel amps are generally used for subs and four channel amps are generally used for speakers.

Choosing amps and subs can be a bit complicated if you don't know what you're doing. You get into ohm ratings and different wiring methods of the subs to achieve certain ohm ratings, so it's best to let someone that has knowledge in car audio to help you choose.

*A box for the sub(s). This is pretty self-explanatory.

You also need all the necessary install parts. That's usually something that whoever you take it to mentions.

Hope this helps.