Tidy up the site on WP posting information, changing options

Website
http://workwear.qsolution.ru/ need a WP specialist
1. Update, clean the site from unnecessary plugins, bring it into proper shape.
2. Need to be placed
on the main page information about our
mobile application.
http://doc.qsolution.ru/workwear/2.6/mobile-app.html#_Introduction
maybe some picture with a view
mobile phone and overlaid
pictures of the program with small
an explanation of what they can order
personal account for the employee. Preferably
with active download buttons in
3 stores.

3. Find
a solution, in order to show people
on the site that options and pictures can be
switch. Maybe in pictures
add some arrows that
will switch them left to right. Well
or any other solution, now 99% of people
do not realize that you can click on
items to switch pictures.

4.
And in general, I wanted to
would agree on some more or less
regular support. For example, we have
every 3-4 months a major release is released,
I would like if I need a main page
update to have a person. News we
well do it ourselves, and the content is a problem.
no, but as for the layout here
there are problems.