When to change manual transmission oil on 2012

So I picked up my brand spankin new Tacoma yesterday and asked the dealer when it will be due for its first transmission oil change because I did not see it on the printout of the maintenance schedule they gave to me. The person at the parts desk told me that because its a sealed unit they are good for life, but then also said I could do it at the same time I replace my clutch. Is any of this true??? I don't really trust the parts girl working for 9 bucks an hour.

Any advice will be greatly appreciated.

By the way, at this point I don't indent to be pulling a trailer and off road use will be light