I initiate several documents each month that are signed by the same parties. Can I save their name, title, company name, etc., for future use, so they don't have to type it in each time, but rather can just sign and date the document?

Templates can be used for that specific purpose. Create a Template, drop whatever tags such as Text, add text to those fields (pre-fill for the client). You can even set the Recipient to the same email address, name. Save. When you go to Send an Envelope, instead choose Use Template or you can apply the Template after adding the document. (Template acts as an overlay). You can also leave the text boxes blank and then fill in that detail for the Recipient when you Send. Templates are a DocuSign feature so you may need to have a specific DocuSign plan and a specific set of permissions. So check with your DocuSign Admin for these details.