The laws governing the legal use, storage and carrying of firearms are constantly changing. Below are the applicable laws in the State of Indiana as of 3/06/2013. The below information is designed to be a guide and not the final word. If you have specific questions, please refer to the Indiana State legislation at in.gov. Another great resource is a Firearm FAQ, provided by the Government of Indiana.

IC 35-47-2-1 Sec. 1. (a) Except as provided in subsections (b) and (c) and section 2 of this chapter, a person shall not carry a handgun in any vehicle or on or about the person's body without being licensed under this chapter to carry a handgun.
(b) Except as provided in subsection (c), a person may carry a handgun without being licensed under this chapter to carry a handgun if:

(3) the person carries the handgun in a vehicle that is owned, leased, rented, or otherwise legally controlled by the person, if the handgun is:
unloaded;
not readily accessible; and
secured in a case;

(4) the person carries the handgun while lawfully present in a vehicle that is owned, leased, rented, or otherwise legally controlled by another person, if the handgun is:
unloaded;
not readily accessible; and
secured in a case; or

(5) the person carries the handgun:
at a shooting range (as defined in IC 14-22-31.5-3);
while attending a firearms instructional course; or
while engaged in a legal hunting activity.