Need help with theme problem

I think you did not install correctly your theme on your Wordpress. You can install theme on different ways:
Try any of them:
Adding New Themes using the Administration Panels
You can download Themes directly to your blog by using the Add New Themes option in the Appearance sub-menu.
1.Log in to the WordPress Administration Panels.
2.Select the Appearance panel, then Themes.
3.Select Add New.
4.Either use the Search or Filter options to locate a Theme you would like to use.
5.Click on the Preview link to preview the Theme or the Install Now link to upload the Theme to your blog,
6.Or use the Upload link in the top links row to upload a zipped copy of a Theme that you have previously downloaded to your machine.

Adding New Themes by using cPanel
If your host offers the cPanel control panel, and the Theme files are in a .zip or .gz archive follow these instructions. Note: This assumes the Theme you download is a compressed (.zip) file containing a folder under which all the Theme files reside.
1.Download the Theme .zip file to your local machine.
2.In cPanel File Manager, navigate to your Themes folder. If your WordPress is installed in the document root folder of your web server you would navigate to "public_html/wp-content/themes" and if you have WordPress installed in a sub-folder called wordpress, you would navigate to "public_html/wordpress/wp-content/themes".
3.Once you've navigated to the Themes folder in cPanel File Manager, click on Upload file(s) and upload that .zip file you saved in Step 1.
4.Once the .zip file is uploaded, click on the name of that file in cPanel, then in the panel to the right, click on "Extract File Contents", and that .zip file will be uncompressed.

Adding New Themes Manually (FTP)

To add a new Theme to your WordPress installation, follow these basic steps:
1.Download the Theme archive and extract the files it contains. You may need to preserve the directory structure in the archive when extracting these files. Follow the guidelines provided by your Theme author.
2.Using an FTP client to access your host web server, create a directory to save your Theme in the wp-content/themes directory provided by WordPress. For example, a Theme named Test should be in wp-content/themes/test. Your Theme may provide this directory as part of the archive.
3.Upload the Theme files to the new directory on your host server.

Selecting the Active Theme

To select a Theme for your site:
1.Log in to the WordPress Administration Panels.
2.Select the Appearance panel, then Themes.
3.From the Themes panel, roll over the Theme thumbnail image for the Theme you are interested in to see options for that theme.
4.You can view more information about any theme by clicking Theme Details.
5.A live preview of any Theme (using your blog's content) can be seen by clicking Live Preview.
6.To activate the Theme click the Activate button.
Your selection will immediately become active.

Maybe state the theme name and/or your site?

PM me your WP login details, can get this fixed for you.. No cost.

can check php.ini permission

Check if the theme you're trying to use uses another one as a parent theme. Also, try deleting every theme besides the default one and install another one to check what happens.

Do you have any content on your site and images are missing from your content?
If you mean the images on the theme's demo then you have to configure your theme most likely.
Many premium themes show you how your site can look, but you have to configure it.
They have tons of options.