Shane is right Goliath, UTC and TRS 2006 are no longer supported by Auran/N3V, and are classed as 'legacy' versions. So yeah, as Shane said, to access and download content from the Download Station (DLS), you either have to purchase a 'First Class Ticket' from N3V which is kind of like a subscription to the DLS - the benefit of that is download speeds are very fast and there are no limits to how much you can download. First Class Tickets (or 'FCTs' as they're known here), work for every version of Trainz you have registered, whether it's a supported version or not.
The other option is to purchase and register a supported version of Trainz (currently the earliest version as far as I'm aware that is supported is Trainz Classics 1, 2 and 3). As well as providing access to the DLS for free for that version, it also allows you free access to the DLS for all earlier versions of Trainz as well up to the version you registered.
As well, you can also purchase a FCT for latest versions too if you'd like - in fact it's recommended as the free DLS is often unreliable, it's speed is greatly reduced to little more than dial-up speeds, and you're limited to downloading no more than 100mb of content per day. That may sound like a lot, but it's not - routes especially can run into several hundred megs easily when you include all the extra content included.
As for route making, my best advice is to click 'create route', and just experiment - it's a simulator so what is possible is only limited by your own imagination, available content and the limits of the software and hardware!
But yeah, just create a new board, add some ground textures to it like grass, dig rivers and build hills, lay roads and rail track, place buildings, trees and other scenery, and pretty soon you'll have a route! There are no real hard or fast ways to route building - that is just my own experience from when I first started years ago.
If you have model railway experience then you'll feel right at home as Trainz is something of a fusion of both real full-size railroading and model railways - the ground in routes are called 'boards', and the edge of each board are lined like the fascia on a model railway. You can even bulid routes in simulated model railway scales (like HO) if you so desire instead of full size scale, partciularly handy if you want to use Trainz as a form of model railway design software. Full size railway knowldege is helpful but not completley necessary - and if you're ever stuck, then just ask on the Forum (the 'Prototype Trainz' section is particulary useful for this), as you'll find the community is more than willing to offer advice and knowledge.
Anyway, hopefully I haven't droned on too much. Welcome to Trainz!
