well, the boba fett is just a common boba fett the gun he came with is the standard stormtrooper blaster, I think fett came with the blue/black or blue or even the all black thanks to the droid release. so don't have to be too picky with him ... mint complete he'll hit 20 bucks no weapon and play wear as low as a buck or two up to 10 maybe 15 if in super nice condition .. one thing I do know from a taiwan fett I had .. the green chest paint can come off pretty easy
the emperor is one of the most common to find mint in bag due to being a mail away figure. ebay would be the best way to find out the going rate for him, I'm not a baggie collector so I don't follow their values.
the han in carbonite is most likely 1998 and not 88 since that's the year hasbro made him, he can be found Mint in box for around 30 bucks so if your's is loose prob about 10 bucks.
I don't know much about the badges someone will help you out sooner or later ... pictures would help a lot.
welcome to the place I'm not much of an active poster but there are a lot of good guys on here that are. Have fun and you'll find it's a great hobby.