I haven't decided if I want to use Classic Shell instead of the new start menu like i previously had done on Windows 8/8.1. However, if I do, is there a way to disable the new search button in the task bar?
You could always search for a way to kill the search button in order to not search anymore on the search button
I like the new start menu except for remote desktop. With classic shell I can do a remote reboot from the menu. I know I can type something in but always forget. I'd like to install CS but still use the windows native start button but haven't figured that out yet.
RDP reboot is one of huge amount of features that makes CS mandatory. Anyway you can can customize the CS behavior to your liking. Say use shift+click to open it, and just click to open the stock crap.