When an effect is able to change another effect's target, the new target must still be a legal one. Terror cannot target a Black creature, so Willbender would be unable to change Terror's target in this case.
If a creature has Intimidate, when it attacks, it can only be blocked by creatures that share a colour with it, or artifact creatures.
No because it cannot target the creature. Read the hexproof ability
You can't attack an opponent's creature directly. you attack your opponent directly with your creatures. It's up to them to decide whether or not to block. The exception to this is if one of your creatures has the Provoke ability which means you can force another creature to block it.
An Artifact Creature is simply a creature who is also an artifact. It is subject to all normal rules regarding both creatures and artifacts, and if a spell can be used against a creature or an artifact, it can be used on that creature.
The ability "Defender" is actually a disability, a creature with defender cannot attack. Creatures with Defender often have "Wall" as their type.
A human is the creature that has the ability to electrocute a horse.
A creature with First Strike deals damage before creatures without first strike during combat phases.
Of course. There is nothing about being tapped that stops a creature being targeted or otherwise affected by a spell or ability, unless specifically stated that they work only on untapped creatures.
Creatures who have ?? as their level are too high level for you to tame - you can only tame creatures of your level or lower. Also, sometimes the ?? means that the creature is a Boss - these can never be tamed. You can use your Beast Lore ability as a hunter to check on any creature whether it can be tamed or not.
Rampage is a triggered ability on creatures and is written as Rampage followed by a number (E.g. Rampage 2). When a creature with rampage is blocked it, gets +X/+X until the end of turn for each creature that blocked it beyond the first one, where X is the value written after rampage. E.g. If a creature with Rampage 2 was blocked by a single creature, it would gain no bonus to its power and toughness; if it was blocked by two creatures it would get +2/+2 until end of turn; if it was blocked by three creatures it would get +4/+4 until end of turn, etc.
Creatures that has first strike deals their combat damage before creatures without. So if a 2/2 creature with first strike blocks a 3/2 creature without first strike the 3/2 will die from the first strike damage and the 2/2 will not take any damage.
Crown of Awe gives a creature (or creatures if you use its sacrifice ability) protection of red and black. That mean the creature can't be blocked by red and black creatures, be dealt damage from red and black sources, be targeted by abilities from red and black permanents, or be targeted by red and black spells.