I am trying to make offline version of wikipedia. But the problem is I am not able to download image dump of wikipedia. All they provide is SQL with only meta image info, there is not actula images anywhere.
Also, I am using wikimedia to run wikipedia on local server. Any help how to download images or is there other way to download images/content on local.
You probably want to look at Kiwix which provides a complete offline Wikipedia experience with thumbnails. (~75 GiB)
The reason there isn't any tarball because its huge. The "Fair Use" media (low resolution copyrighted images such as poster, album art, etc.) for English Wikipedia is 162 GiB. We also have a lot of media on Wikimedia Commons, 153 TiB, mostly unused.
Limiting to only what's necessary for English Wikipedia, you'll need to download 5.1 TiB from 4,525,268 non-multimedia files.