In order to have a slide show on your personal page here at Doodle Kisses you have to upload photos to the main photo section. Click here for instructions.
From there you can create albums for your photos to lump similar photos or themes together such as "Rosco's Swim Day" or "Puppy Days", etc.
You can also direct your page's slide show to pull from either your most recently uploaded photos or from a slide show. Simply look at the bar above your slide show and to the right is a button called "Edit". Click on that button to choose what photos are displayed or pick an album to display. Note that if you have more than 100 photos then using the "recently added" selection will only show the most recent 100. You can also check the "Random" box for photos to be dispayed in random order!
You should be able to get 100 photos into one slide show. However, first you have to make an album. And each page of the album can hold 20 photos. When you fill up the first page, you have to click 'next page'. Does that help?