So my husband applied for the EEA Family Permit via Surinder Singh, which was granted to us yesterday

The visa is valid for 6 months and my husband must travel to the UK accompanied by me (as the British Citizen)
I am thankful I have crossed the first hurdle, but i am so clueless of the next steps and looking for some help with some questions I have

* So when we decide to travel together back to the UK, what will happen at the border? Are we likely to get questioned and have to supply any documents? If anyone knows or has experience please advise.
* As the visa states he must be accompanied by me does this mean that once we first arrive here and for shifting over IF he needs to go back, he won't be allowed in without me?
* Does EEA family Permit come with any restrictions for my husband? Can he work with it etc?
* What do we do when we arrive? I am clueless to what we do next? Apply for my husbands National insurance number?
* How do we get the 5 year stay? What do we have to do to be eligible for it? What are the requirements?
Sorry for being quite ignorant in this area. Spent all my energy in mastering the requirements for SS application and didnt look into what do to after getting it.
If anyone doesn't mind advising or pointing me into a direction where I can find out all the information, i'd be grateful.
Many thanks