Welcome @possoms! Just look at the first page where all the listings of train cars and lots are. If there isn't a name at the end, then isn't claimed yet and you can mention that you'd like to it. @soocoolsim will add your name at the end and then its yours to do.
@Sandraelle - I thought the same about some of the carpet and plaid choices not quick being my thing, so I too toned down some things! I'm glad you like the gold choice too. I think it goes well there.
I'm still having a challenge with some of the doors, but I think it's a result of other items I've MOO'd into corners and not the doors and handrails. So, I'm still playing with CASt, MOO, and upgrading on my Royal Scotsman spa car and state car 1. Is it okay if I added some chairs outside on the deck of state car 1, and that I used the same logo I did for the rear observation lounge deck? (I didn't change anything, just added two chairs - one either side of the door - and put the same deco on the railing that I used at the end of the train. I thought they might have the same logo on the front.)