My brother got a thunder tumbler for Christmas and both car and remote turns on all batteries are installed right but the car won't move. What should do?

I saw this problem on a 2010 chev diesel. We had to disconnect the battery. His problem was the ignition switch shorted out causing current to feed the starter . There maybe a broken connection with the switch mechanism that is not allowing the switch to change the internal selection slide.
Now if the key is stuck and not returning, then the tumblers may have come apart . This would require a new key and tumbler assembly.

They are running the same radio frequency signal!

this is covered in the FSM. best is to ask a lock smith, (no kidding)
it is also cover at all 3 top online fsm sites (vitrual fsm)
at alldata.com
mitchells.
and chiltions online.

the tumbler just dont fall out, it has protections from thieves (weak)
most cars, you must remove the key assembly
the pull the tumble pin, hidden and blocked by the mounted assembly.
those are generic words.
the steps can vary if car has steering wheel, vert adjustment option.
here is a non Air bag quote

Without Air Bag The ignition switch is located on the lower part of the steering column.

1. Place the ignition in the LOCK position.

Ignition/dimmer switch assembly

1. Remove any components necessary to access the switch.
2. Remove the two switch mounting screws.
3. Disconnect the switch from the rod.
4. Disconnect the wiring and remove the switch.

To install:

1. On non-tilt columns:
   1. Move the ignition switch slider to the OFF unlocked position (move the slider all the way down, then back two clicks). The remote rod hole in the ignition switch slider should now be centered.
   2. Insert the remote rod in the ignition switch slider hole and install the ignition switch on the steering column. Tighten the attaching screws to 35 inch lbs. (4 Nm).
2. On tilt columns:
   1. Insert the ignition key in the lock cylinder and turn the cylinder to the OFF unlocked position.
   2. Move the ignition switch downward to eliminate any slack and tighten the attaching screws to 35 inch lbs. (4 Nm).
3. Install any components removed for switch access.

turn the key slightly back and forth while pulling the key out

yes possible.

Car not starting or turning over indicates towards multiple possibilities. It can be issue with battery or weak battery. But if battery checks out ok, then it can be starter issue or faulty alternator or problem with low fuel pressure or no spark at spark plugs due to dirty spark plugs or faulty ignition coil or injectors getting cracked or dirty and needs to be cleaned.

To confirm the problem, the basic troubleshooting is required.

Click this link below and follow the troubleshooting:------

http://technoanswers.blogspot.in/2012/02/car-starting-issues.html

---------

This will help.

Thanks.

If the wrong key was inserted it may have bent a tumbler pin,maybe try some wd-40 or similar and work it with the right key,might drop the tumbler back,,if not the whole ign. cylinder will have to be changed

was the ignition switch getting hard to turn with the key for a while or did this just all of a sudden happen usually the problem has been going of for a while but people just ignore it until it gets to this point,it sounds like the tumblers in the ignition key switch have gone bad and the tumbler assembly needs to be replaced,the new tumbler assembly can keyed to the original key if the key is not worn out.this should be replaced with a new key if it is.

If the key only moves slightly try a little wd-40 in the lock, the tumblers in lock might be sticking

try jumping it.