How do I add the Categories and tags related to each entry?
Supposing your categories and tags fields are named, respectively, newsCategories and newsTags, you could do the following for the categories:

{% for category in entry.newsCategories %}
    &lt;a href="{{ category.url }}"&gt;{{ category.title }}&lt;/a&gt;
    {% if not loop.last %},{% endif %}
{% endfor %}


And for the tags:

{% for tag in entry.newsTags %}
    &lt;a href="{{ tag.url }}"&gt;{{ tag.title }}&lt;/a&gt;
    {% if not loop.last %},{% endif %}
{% endfor %}


This code is untested, but I think this should more or less do what you want to achieve.