there are no DOF markers on the kit lens. In fact, it doesn't even have distance markers. I wouldn't worry about it.
There is a proper manual focus. Just switch to MF mode and you're good to go. However, the focus ring is at the end of the len and it's pretty thin. With the 350d, the viewfinder is really small and dim and I doubt you'll be MFing even 5% of the time. Almost every time I tried MFing, I'd usually focus worse than the AF system.