can I use only my two limits at both end of travel connected to 1 pin for both x+,x- and home , what I mean is, if my limits switches are connected in series on the same pin number , can it also be use as a home switch?

If your talking about Mach3, YES.

Mach 3 is the controller I am using, with Bob-Cad design software and Xylotex 3 axis driver. So you just put the same pin number on x-,x+, and home on your pin configuration?