As you are saying yourself, you are using the built in form processor. This processor doesn't have the ability to send autoresponder email or store the data in the database.
You need to use ABVFP for this.
If ABVFP is already installed and the forms were already setup in ABVFP's control panel, then you simply need to change the forms action and include the necessary "Formid" hidden field.

If not, you need to do whatever necessary as per ABVFP Manual.

Repeating here the ABVFP instructions, is meaningless. Just open the Manual (Tutorial) folder in the ABVFP zip and read carefully how to set it up and use it.

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