Hi,

<div style="transform: rotate(90deg); -webkit-transform: rotate(90deg);">Rotated Text</div>

For the landscape you can create paperformat and select landscape for example:

<record id="paperformat_hrsummary" model="report.paperformat">
            <field name="name">Time Off Summary</field>
            <field name="default" eval="True"/>
            <field name="format">custom</field>
            <field name="page_height">297</field>
            <field name="page_width">210</field>
            <field name="orientation">Landscape</field>
            <field name="margin_top">30</field>
            <field name="margin_bottom">23</field>
            <field name="margin_left">5</field>
            <field name="margin_right">5</field>
            <field name="header_line" eval="False"/>
            <field name="header_spacing">20</field>
            <field name="dpi">90</field>
        </record>

Regards