A few codicils first. I shoot with a crop sensor camera, don't mind changing lenses and like the option to shoot in lowlight. I primarily shoot with four lenses at WDW. I cover focal lengths from 18-200mm. My walkaround is a 28-70 f2.8, my telephoto is a 70-200 f2.8. I don't own an UWA but when I need wider I use my 18-55 WR. This lens also serves as my all-weather lens since it is weather resistant like my camera (Pentax K5). For the lowlight rides I use the Sigma 30 f1.4. For the rides I have found the 50mm can be a little tight, but the 30 seems to be just about right. With the 1.5 crop that makes it a 45mm on a full frame/35mm which is very close to the standard 50mm on the old film SLR's and FF.
Now that I have explained what I use (AKA my style), realistically, for a newbie, unless you have an unlimited budget, I would not copy this. Three of those four lenses are third party, Sigma, and the total budget is close to $2,000. If you go with OEM lenses that budget will increase significantly. My first goal would be to learn more about taking images before I would start buying expensive lenses. I would recommend covering the same range of focal lengths but with less expensive consumer lenses (kit lenses) or an all-in-one lens. As your skills increase there is always time to purchase more expensive pro-type lenses when you have developed your style. I would focus (no pun intended) on purchasing an external flash, tripod (maybe two, a sturdy one for around where you live and one for travel (lighter weight and therefore slightly less sturdy) and some type of remote control, either wired or IR.