To the original poster, yes, that is shorthand for working in Attractions (which parking is under the attractions umbrella) at the Transportation and Ticket Center. You could be doing a variety of things, from helping with parking, greeting guests who enter and leave the center, to manning one of the booths at the front gate for parking. If that is what is on your list, that is what they have planned for you to do. To be completely honest, the position they give you is set, and unfortunately there isn't much flexibility when working in parking.
To the person asking about the portal...you will get your access information about the portal and whatnot during your orientation and Traditions. You'll also find out where you are going to work, which can be a number of places, from the Jungle Cruise, the Backlot Tour, Great Movie Ride, Innoventions (my home!), Living with the Land, and I want to say there is at least one more but I can't put my finger on it.
As for work experience, unfortunately with Disney and the union they tend start everyone off at the same rate, which currently is 6.90. Now you are in a high-spiel attraction, and in some instances you are paid more depending on the work you do, up to a dollar more. Disney is big on seniority and the union, so you pretty much have to start at the bottom and work your way up.
Hope that helps both of you!