I my view model(LIST) looks like this:
public class ConversationModel
{
public int ID { get; set; }
public string Body { get; set; }
You should be able to do:
@Model.First().ToUserID
Note, you may want to check whether there are any items in the enumerable first as if there aren't, then First() will return null
(Note, because you had @Model[0] in your question, I assume you are specifically trying to get the first value. I may have the wrong end of the stick, in which case Jakub's answer should sort you out!)