joining two objects
 

ok I made a cune and duplicated it making an instance to make this chest im making symetrical.I did the same thing for the legs.
now i dont know how to join the two objects. how do you join polygons/subdivs.
your help is appreciated!
thanks

To attach 2 polys, line the vertices up exactly how u want them on each object, then enter object mode and shift select the 2 polys, then choose Polygons>Combine. Then merge the groups of double vertices that are produced.