Hi Salma,
The ride to Animal Kingdom from your resort takes about 20 minutes. I always add on 10-15 minutes wait time to that, because I'm never one of those lucky people who walk to the bus stop to find transportation waiting for them. In order to arrive at the restaurant 10 minutes before your reservation, you'll want to plan on leaving between 7:00 and 7:15.
There is a great site called Our Laughing Place that has a transportation calculator. You simply plug in your starting and ending destinations, and it will give you a list of transportation options and travel times. Again, these are not official times, but it will give you a general idea of what you can expect.
To access Transportation Wiz, simply go to
www.ourlaughingplace.com. On the left hand side of the page, you'll see a menu. Click on
Planning Tools to find a drop down menu. Click on
OLP WDW Transportation Wiz.
Hope this helps. Have a magical vacation!