what are all the places you can get items from?

You mean just like regular stores? if so then we'll start with a simple store go to the emporium in main street then click on the cash register on the counter.

I can give you more iF I'm on the right track.

yeah please can you?

there is
Emporium
Small World Imports
Shrunken Ned's
Golden Horse Mercentile
Inner-Space Shop(avaliable throuh the space quest)

All of them you click on the cash register then they go on your list of shops avaliabe through the shop button.