Does this come with the extra bar with the four different shapes to attach to make cookies? Or do I have to buy that separately?

No. I ordered the cookie shape making bar separate. I ordered this because it reminded me of my German grandmother’s cookies I use to help her make. I’m going to try to make the cookies with my granddaughters this year. 🤞Hope they come out like hers.

Was a cookie bar supposed to be included? i didn’t receive one but i purchased this to make german cookies. where can i find a cookie insert?

The cookie bar was supposed to be included, please approach the seller

Can it make long strips of biscotti dough forrolling?

I have not used this yet. At the same time, I also bought a manual German style cookie press. If you want that info I can send it to you. I make a cookie (almond paste based) that is long and once baked you dip in dark chocolate and roll with pistachios. The German style one worked great. I have purchased and tried 2 electric cookie cutters. The electric ones cannot push the cookie out and instead the internal mechanism of the gun gets stripped out and won’t work.