Dashboard has no theme

but I still can’t get in to the themes or my pages.

not sure I understand it.

Review:
https://codex.www.ads-software.com/Using_Themes

https://codex.www.ads-software.com/Managing_Plugins

My dashboard is now only showing Home, Posts, comments,users and tools.
Previously my dashboard had the same plus, themes,pages etc… I cannot get in to Edit any of my pages. My plugins are also gone. I have a back up copy how do I restore it ?

I have a back up copy

Backup copy of what?

of the database

this is the error message that i get in the dashboard……
Fatal error: Allowed memory size of 33554432 bytes exhausted (tried to allocate 1966080 bytes) in /home3/alpineso/public_html/wp-includes/SimplePie/Item.php on line 2736

See: https://codex.www.ads-software.com/Editing_wp-config.php#Increasing_memory_allocated_to_PHP

Too hard I am only a beginner! there must be simpler way…

You can try asking your hosting company for help with this – who is that, BTW?

crazydomains they are not interested they told me to go to word press as it it not their problem…. not happy!

Follow the instructions in the link WPyogi gave you.

There are also, numereous threads that deal with this topic.
For example: https://www.ads-software.com/support/topic/fatal-error-allowed-memory-size-6

hope all this helps.