There's a few things you can do, but some of them are going to be restricted by what you've done so far in character. Have you joined a faction, or have you applied for one yet? They will more than likely be your first resource in which to resort to fo a quick rescue.
Another option is someone will be charitable enough to come and rescue you, as some people on here are actually nice. Personally, i would come as soon as possible and save you, but I'm in the middle of hyperspace travel and am on orders from my faction leader.
Third option is to pay for someone to come rescue you. You can post in the Commerce forum under the RPG Centre heading for any requests, saying how many credits or other assets you are willing to give. As well as posting there with a price tag on it, you can always just post there saying you need someone to come pick you up. Unless I am mistaken, this will be the most appropriate place to post this type of request.
Sorry I'm unable to come get you myself, otherwise I would. Good luck!
To talk to NPCs you need to be in the same place as them, then click the + next to the list of NPCs in the position interface. Next to each one should be a Hail button - click that to talk to them.
Be aware that not all NPCs have a script so if it says there is no script, its not a bug, it just hasn't had one written yet.
As for shopkeeper NPCs, I am presuming you want that to buy some items? If so, you just need to be in the NPC Shop facility, and then click actions and the buy items button there - the shopkeeper doesn't have its script at the moment.
As part of the 'Homeworld project' all race home planets should boast an NPC city, complete with predominantly NPC-owned facilities (including shops) to help new players get started. Yellow District (5, 4) on the Falleen homeworld is such a place.
I wouldn't worry about combat anyway. They will probably start with basic other stuff before the combat. Things such droids and tools/items.
All you need to know for combat is arrest/execute. You should probably start reading there if you are still interest in killing others and taking prisoners. :p
