How did you get that Canadian Pacific 4-6-2?
First, you need to register your edition of Trainz. For various reasons, people on here are wary when someone asks a question and what edition of Trainz they have doesn't appear next to their name. I'm not one of those. However, spammers occasionally appear on here, and when they do, the edition of Trainz they have doesn't appears next to their name, because they obviously don't have one.
Second, you need to have an account at
https://kltrainz.com/. Click on 'Login' to the right of 'K&L TRAINZ' at the top of the homepage and fill in the boxes under 'Register'. Once you have an account, then you can purchase it.
There are also two different versions of each item on their website, one version is for Trainz 2009, Trainz 2010, Trainz 12 Pre-SP1 and Trainz Mac 1, while the other version is for Trainz 2012 SP1, TANE, and Trainz Mac 2, though this edition also work in TRS 2019, so be sure to pick the correct version. If you make a mistake and pick the wrong version for your version of Trainz, or have any other problems, just select 'Contact Us', found by placing your mouse over 'Support'.
The prices are reasonable for such high-quality items, such as $5.00 American for the Canadian Pacific 4-6-2. The 'Megapacks', which comes with the largest amount of individual items are also reasonable, being $10.00 to $15.00 American.
They also routinely have a 'Deal of the Week', which is when they have a select group of items available at a discount price, such as only locomotives that are streamlined.
Hopefully you'll enjoy these models as much as everyone else here does.