Populating the store

[youngy]

Hi, I have to ask this, sorry, its been quite a long time since I last set a store up.

Currently as you can see its blanks:

http://compare-electricals.co.uk/store

Now I do have many products as comparion sets.

My aim with the store would be to fill it with many electrical items as possible, and then give an option for the user to do a price comparison.

Am I right in saying this will only be done with the comparion sets I have already set up?

Also how do I go about populating it?

Do I use only sets i have created or is there another way of providing a kind of "home page" where a user can navigate to all the categories offered by my merchants?

ie dishwasher cateorgoy, TV category etc..

Thanks