1. Jamba and Jamba - Getting Started

2. You don't have macros set up properly. You need your slave to assist you. Starting autoattack autotargets whatever is closest, which is why you are only seeing things work if toggle autoattack first. See the second half of this post.

3. That will require configuring and can be done a number of ways. The most common is to have heal macros separate and only heal when you need to. I use mouseovers configured through HKN. See here, here, here, here.

4. Read the macro forums. And this, and this and this.