-I got the lite version of DarkBASIC Pro and I found out that it hasn't got any graphic editors. Is that true?
Thats true but why try to reinvent the photoshop wheel per say
You can use any 2d or 3d package provided it supports the required formats that DBP does.
- Which editor can I use to make for example a huge jump and run level?
You could use a matrix editor
theres a list of free ones on the RGT forum
http://www.realgametools.net/forums/index.php?board=16;action=display;threadid=4271
You could also explore exporting it from a 3d app
or you could invest in CShop and make BSP type worlds.
- Which editor is good for characters?
I like Milkshape but theres tonnes around
http://www.swissquake.ch/chumbalum-soft/
-Can I download examples so that I can learn the programmer language?
If you were part of DBDN you can access some snippets there also
http://www.darkbasiccodebase.co.uk
is a DB1 snippet site, You may have to modify some to work in DBP.