Hello MohsinAfsar,
Thank you so much for your question regarding our theme.
1. To control the number of words on the blog page is available on the premium version of this theme. So we recommend you to use premium version. Otherwise you need to customize the theme.
2. In case of image, we recommend you to use the high-quality image and use acme fix images to make the size. If the image you are using is of small size/quality it will not work.
Please try this and let us know.
Regards