Click on your wolf, and scroll down to the 'Character Attributes' section. Then click 'assign character points' and enter in the amount of CP you want to give and click submit. You can't assign more CP than you have, obviously.

This can be done by heading to the forum section that you need to make a post in. Scroll all the way down just like how you came to write your replies to this topic. Then at the section labeled "Create a Topic", simply follow the instructions provided, give your thread a title and write what you want to write!

Is it possible to bring a wolf who was born in my pack back to life?

I'm not completely sure what you mean. If you mean your wolf died of old age or you retired it, then the answer is no. You can retrieve wolves for a certain amount of time from the free range.

How do I play with another pack's wolves? (Nose pushing, etc)

I press Nose Pushing and nothing happens