Look at your log. It says it can't find the indexes and content in your dir.root C:\Alfresco\alf_data
Alfresco stores the content files and full text indexes (Lucene) on the file system. For Tomcat this location is the <TOMCAT>\shared\classes\alfresco\extension\custom-repository.properties file.
Check the dir.root entry in this file and make sure it points to the correct location of your alf_data directory.
10:46:00,239 INFO [org.alfresco.repo.admin.ConfigurationChecker] The Alfresco root data directory ('dir.root') is: C:\Alfresco\alf_data
10:46:00,271 ERROR [org.alfresco.repo.admin.ConfigurationChecker] CONTENT INTEGRITY ERROR: Indexes not found for 4 stores.
10:46:00,271 INFO [org.alfresco.repo.admin.ConfigurationChecker] You may set 'index.recovery.mode=FULL' if you need to rebuild the indexes.
10:46:00,271 ERROR [org.alfresco.repo.admin.ConfigurationChecker] CONTENT INTEGRITY ERROR: System content not found in content store.
10:46:00,271 ERROR [org.alfresco.repo.admin.ConfigurationChecker] Ensure that the 'dir.root' property is pointing to the correct data location.