i have not got store on my i pod any help how to get it

You need to update the iOS on your iPod. The 1G can only go to 3.1.3 and you get that here:

Purchasing iOS 3.1 Software Update for iPod touch (1st generation)

Note that thee are not that many apps that sill with with the 1G with iOS 3.1.3. You have to look at the Requirements section of the App description to determine compatibility.