Question about Denver WCT-8010 Wildlife camera

Yes, the unit has a timer. With this, you can preselect a time window (e.g. only be active at night).

After some trial and error, I managed it.
The easiest way was with instructions from the internet.

Yes, you can. You can also set whether it should film or take photos. However, it is an enormous battery guzzler... otherwise I think it is good.