The ornamental design for a toolbox, as shown and described.
FIG. 1 is a perspective view of a toolbox showing the new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a right side elevational view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof; and,
FIG. 8 is an alternate embodiment of the front elevational view of FIG. 2. The second embodiment is identical to the first embodiment with the exception of the front view as shown in FIG. 8.
The broken lines illustrate portions of the toolbox and form no part of the claimed design.