configuración de servidor

Mi web está creada con el theme AVADA. En la página de server status me da los siguientes avisos:
PHP Time Limit: [?]
60 - We recommend setting max execution time to at least 180.
To import classic demo content, 300 seconds of max execution time is required.
See: Increasing max execution to PHP
PHP Max Input Vars: [?]
1000 - Recommended Value: 2100.
Max input vars limitation will truncate POST data such as menus. See: Increasing max input vars limit.
SUHOSIN Installed: [?] ✔
Suhosin Post Max Vars: [?]
2048 - Recommended Value: 3600.
Max input vars limitation will truncate POST data such as menus. See: Increasing max input vars limit.
Suhosin Request Max Vars: [?]
2048 - Recommended Value: 3600.
Max input vars limitation will truncate POST data such as menus. See: Increasing max input vars limit.
Suhosin Post Max Value Length: [?]
1000000 - Recommended Value: 2000000.
Post Max Value Length limitation may prohibit the Theme Options data from being saved to your database. See: Suhosin Configuration Info.

He intentado arreglar esto modificando el archivo .htcaccess pero me siguen saliendo los avisos.
¿Cómo lo puedo arreglar?

Gracias

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