You need a video converter. This can convert the mov files to DIVX/MPEG4.
I generally use Canopus Procoder but there are others which do a good job and dont cost a lot
1)You can burn a Data DVD disc with DIVX/XVID files. Note that not all DVD players can play them
otherwise
2) You can actually import the mov files into a software video editor which accepts them as input and then edit (by joining the clips) and
Create a standard DVD video
or
Output as Divx file which you can then burn to a Data DVD disc
either if which should play on your DVD player
If you want to retain quality it is helpful to minimise the no of conversions and the all in one solution of using a software editor is probably the best since it is all done within the same software
Avoid thinking you have to convert to an "avi".
AVI is not a format as such and its suffice can have files encoded differently
However if converting the mov to a divx file means it is avi , fine
Very few Video editing software titles do not now support mov so which ever you use is largely a matter of preference
Good luck