Help for a newbie

[Lanshire]

Hey guys.. i am a COMPLETE newbie when it comes to any of this. I had my host install the store script. ( took him about 30 min). Anyway, i wanted the store because i am gonna be incorporating 2 things. Its basically 1 thing alltogether though.

I am gonna be putting another's site data ( images, gallery-list, pricing..ect). i have the data from the other store that i am gonna be selling for, and was wondering if you could put this is extreme dummy terms for me on how to do this, once i am logged into my admin panel threw my shop?

I am using 1.36

Thanks
Randy
p.s I will be more than happy to post pictures if that would help.