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yes
not recommended
The 2004 Toyota Land-Cruiser has 39.1 in. of rear head room.
The 2004 Toyota Land-Cruiser has 39.2 in. of front head room.
I would not recommend it. The bolts are stretched during the torque procedure.
You can, but I would advise against it. The old bolts have streatched and you should install new head bolts.
The head bolts will not have the same clamping capabilities, since they were stretched on the first installation. You may blow a head gasket due to the bolts losing torque.
Yes, if they are not damaged in any way.
Yes you never reuse headbolts
You can try to clean the head bolts using either a wire brush and solvent, a bead blaster or soda blaster. After the bolts are cleaned thread them into the block to make sure they turn freely. If there is any indication that the threads are damaged do not use the head bolts. Do not use a sandblaster to clean the head bolts since that will cause erosion of the threads, making the head bolt unusable.
Use a bolt extractor. It is not recommended to reuse the head bolts, that is why they are designed to not fit a 12mm or a 13mm.
If the key has a thin black head, no. If Gray or brown, yes. If it has the built in remote, yes.