Should I tell students that it's my first time teaching the course? I'm a TA teaching a class this fall for the first time.  I've taught before, but never this class, and never felt an obligation to tell my students it's my first time teaching a given class.  But, being a bit more experienced I thought it might be a good idea this time by perhaps endearing me to my students, being so candid on the first day.  Does anyone have similar thoughts on approaching a first-time teaching role?
Recommend not on the first day.

I'm actually in exactly this situation for the fall term, so I was prepping myself mentally for just this issue. In my experience, expressing any uncertainty about the course on the first day prompts almost instantaneous pleading/negotiation/argumentation over any and all stated procedures (parameters for assignments, grading, due dates, etc., etc.)

Now, this is partly influenced by the fact that I work at an urban community college where the student maturity level can be quite low for certain courses. If you work at a more high-powered institution then the environment might be different. But I still think it best to be authoritative at the start, gauge the environment on subsequent days, and then if you feel comfortable admitting the situation and/or asking for feedback later on, you'll be more confident about doing so.