No creatures live in lava, lava damages all mobs in the same way as normal people.
Creatures known as extremophiles have been found to live in extremely hot environments, but no known creature can survive in molten lava due to the extreme heat.
You can find lava underground.
Yes, bedrock will block lava.
no
The most common creature in minecraft are cows, pig, chickens and shepp. But it also depends on the seed
The Minecraft block ID for lava is 10 or 11 for stationary and flowing lava respectively.
Lava layer is around 12-14
You can't MAKE one, but you can collect lava with buckets.
1: go mining 2:find lava 3:profit
All seeds have lava lakes
Because of your texture pack.
Yes.