Yes, to enable parking monitoring mode, you need a hardwire kit. This kit is not included and please purchase separately. SKU: GW41.0100. 

No, you need to check which battery model your camera is compatible with. 

Yes, it comes with a mount which is a plastic pipe with a pivot at the base. I'm sure you could mount the station itself on the same size pipe. The hardest thing would be getting it level. I'm not sure what diameter the pipe is but I would guess the outside diameter is around 1 in. The pipe in the picture is part of the base, and the unit sits over the end of the pipe. Hope this answers your question. 

Yes …. You can use anywhere it goes with you… I use mine in our camper 

Has a 1/4 threaded connection for use with a tripod