Hi,
1. RE: How can I move the send button to the right side?
Please include a link to your Contact Form 7 form so we can examine your form in detail using Firebug or Chrome Dev Tools to understand the CSS used for your CF7 form elements.
Once we understand how the HTML and CSS is configured in your CF7 form, we should be able to see the CSS changes you need to change the appearance of the form to suit your requirements.
2. RE: How can I put 2 input boxes in the same line?
You could consider using Contact Form 7 Skins to style your Contact Form 7 Forms.
You can now use the add-on CF7 Skins Ready to put form fields together on the same line.