Are cribs and highchairs available? If so, is there an additional cost to it?

don't believe so. But if you call them and request them in attendance they might have something they can do.

No

No highchair or crib in the rooms and I had an infant. Probably available on request. Not sure though

I think they are with the room but I am not sure. It was not a concern for me when I stayed there.

Not sure, probably available upon request.