Hi ludo974
1 - This belongs to the copyright section defined in the footer block of this template, you can open the file:
/templates/ja_healthcare/tpls/blocks/footer.php
At approx line 58 to 63:
<small>
<a href="http://twitter.github.io/bootstrap/" target="_blank">Bootstrap</a> is a front-end framework of Twitter, Inc. Code licensed under <a href="http://www.apache.org/licenses/LICENSE-2.0" target="_blank">Apache License v2.0</a>.
</small>
<small>
<a href="http://fortawesome.github.io/Font-Awesome/" target="_blank">Font Awesome</a> font licensed under <a href="http://scripts.sil.org/OFL">SIL OFL 1.1</a>.
</small>
You can change text as you wish.
2 - It's T3 logo, you can override this css rule and use your new logo there:
.t3-logo-light {
background-image: url("//static.joomlart.com/images/jat3v3-documents/logo-complete/t3logo-big-light.png") !important;
}
Put this css rule into the file: /templates/ja_healthcare/css/custom.css (you may need to create this file if it doesn't exist now)