1: go mining 2:find lava 3:profit
You can find lava underground.
Yes, bedrock will block lava.
no
The Minecraft block ID for lava is 10 or 11 for stationary and flowing lava respectively.
Lava layer is around 12-14
All seeds have lava lakes
You can't MAKE one, but you can collect lava with buckets.
Yes.
Because of your texture pack.
Use a bucket
No creatures live in lava, lava damages all mobs in the same way as normal people.
When water meets a lava 'block', the lava is converted into an obsidian block. If water meets 'flowing' lava then the lava is turned into cobblestone.