If I may, I'd like to take this thread in a slightly different direction - back to basics. I have the impression that adam340 may have been out of the model building hobby for quite a while, and unfamiliar with what it looks like nowadays.
The modern plastic ship model kit is quite a bit different than the ones you probably remember building as a kid. Plastic scale modeling has, to all intents and purposes, ceased to be a kids' hobby; the kits that have been produced in the last ten, or even twenty, years have been intended for adult enthusiasts.
The typical modern aircraft carrier kit has several hundred parts, many of them quite small. To build it typically takes months; some of the simpler (i.e., older) kits can be done in a few weeks, and some modelers have been known to spend over a year on a single model. The "snap-together" kit is almost a thing of the past; there are a handful of airplanes and cars (which are targeted at kids) in that category, but I don't know of a single warship.
The typical modern plastic kit is designed to be painted in its entirety. Serious ship modelers do research on the exact colors (and sometimes get into pretty fierce arguments about them). There are vast ranges of paints on the market - and modelers also get into arguments about which is best.
I'd have to rate the difficulty of virtually any state-of-the-art aircraft carrier kit on either of the two most common scales, 1/350 and 1/700, at 10 out of 10.
With a few exceptions, modern kits don't come with paint, cement, or anything else you need to build them. You'll need quite a few things to do even a basic job on a kit: at least half a dozen colors of paint, cement, brushes, tweezers, an X-acto knife, and some sort of small files (or emery boards) at the minimum. Experienced modelers build up tool kits of dozens of tools. Many of them use airbrushes for painting, but I suggest you don't worry about that in the beginning.
I checked the Trumpeter website; it doesn't list a U.S.S. Enterprise. In the company's early days, it reissued some simple, rather crude kits that were originally made by other companies; maybe the Enterprise kit on E-bay was one of those. (I suspect some other participant in this Forum can list all the kits Trumpeter has ever made.) I wonder if that ad was somehow garbled. I don't think it's possible to design an aircraft carrier kit with 23 parts; I wonder if that might have been the number of airplanes the kit contained (in addition to the parts making up the ship itself).
If you want to dive back into ship modeling after a long absence, I have to suggest that a carrier is not the best kit to start with. (The carriers Trumpeter does make have hundreds and hundreds of parts - and cost a good deal of money.)
Revell does make a 1/720-scale Enterprise that's been on the market for more than thirty years, but is, by most accounts, a pretty good kit. It has 102 parts. Here's a link to the relevant page on the Revell website: http://www.revell.de/index.php?id=210&KGKANR=0&KGKOGP=10&KGSCHL=45&L=1&page=1&sort=0&nc=&searchactive=&q=&SWO=&ARMAS4=&PHPSESSID=67a26fb0bf08da77303c4de354304dae&KZSLPG=&offset=4&cmd=show&ARARTN=05046&sp=1 . If you really want to start with a carrier, this might be a good choice. Be aware, though, that 1/720 scale is mighty small. Some adult modelers find it seriously challenging - especially if they (like me) have arthritis and/or fading eyesight.
Revell just recently released a model of the U.S.S. Nimitz on 1/1200 scale. That's really small. Here's the link to the website: http://www.revell.de/index.php?id=210&KGKANR=0&KGKOGP=10&KGSCHL=45&L=1&page=5&sort=0&nc=1&searchactive=&q=&SWO=&ARMAS4=&PHPSESSID=67a26fb0bf08da77303c4de354304dae&KZSLPG=&offset=36&cmd=show&ARARTN=05814&sp=1 . If you click on the right box (the one with the little image of a wrench) you can see the instruction sheet, which will give you an idea of what you're getting into. I haven't seen the kit, but on the basis of the instruction sheet and the photos it looks quite nice.
I hope the above hasn't insulted adam340's intelligence. And I certainly hope I haven't discouraged him or anybody else from taking up the hobby; it's a great one. But I do think newcomers to it need to go in with their eyes open.