You generally have the option of ordering the installation disks at the time of order.  Since I'm guessing you didn't choose that option, you can call and order a set after the point-of-sale, but it will still cost you $15-$20.  The only time tech support will send you the disks free of charge is if your hard drive dies and you are not able to return the system to original factory condition using the recovery console or the recovery disks you are able to create from the OS.

In any event, the disks you order from Dell will be standard/plain/clean OEM disks with no additional software on them ... those apps (and drivers) will be on a separate disk.

FYI ... systems ship much cleaner than they used to.  I found with my last one, there was no need to do a clean install, as there wasn't much installed on it.  There's really nothing offensive or that couldn't easily be removed.  Up to you though.

As noted, new PC's do not come with much junk like they used to.  There is no need to do a "clean" install and in fact it will be a hassle getting everything working properly.  Some of the needed pre-loaded software is not available for manual install.   Best suggestion is the old "if it ain't broke don't fix it".

Download the free version of the Revo Uninstaller and uninstall anything you don't want.  The Revo Uninstaller goes further than the standard windows uninstall as it also removes registry entries and any left over files.  Revo Uninstaller

However, a replacement set of discs can be ordered  HERE  for US customers.