How do I create a "start to finish" dependency?

I would like to establish "start to finish" dependencies in my iteration plan, and I am looking for a way that RTC can automatically calculate information for me based upon the relationships. I know that I can establish a "depends on" relationship between 2 tasks, but I do not see how RTC uses this relationship. Specifically, I am trying to understand:

1. Can I display the estimated completion date of a work item, where this date is calculated based upon the estimated time of the work item, the current date, the allocation of the owner to the team area and the finish date of any "blocking" work items? Actually, I would like to know if you can do this even if RTC does not take dependencies into account.

2. Can RTC provide me a warning when a work item will complete after the end of the iteration, taking into account that the work item depends upon another work item which has not finished? For example, task 1 will complete 1 day before the end of the iteraiton. Task 2, depends upon task 1 and takes 3 days to complete. Since task 2 will finish after the iteration ends, I want a warning.