I need a wordpress template default settings updating & blog posts moving over

General information for the website: blog
Kind of development: Customization of existing website
Description of requirements/features: I have several customisations to make to my current wordpress website theme. I have recently installed a new theme where i had existing content.

I need the 404 Page Image updating... i can provide the new image as i have created this. The search box removing from this page, the title text changing to black and the title bar background changed to

I need the name and email boxes full width and centred on the Contact Form at the bottom of the homepage and on the dedicated contacts page.

I want to remove Breadcrumbs from individual portfolio pages only.

Currently when I add a new blog i have to duplicate a previous post to bring over the custom page setting design (the large background blue image and black text). I would like the default add new blog settings to match the custom ones on this page: http://charliedavies.co/2016/03/how-to-sound-smart-in-your-tedx-talk/

And all previous blogs on the site updating so that their page settings are consistent. Here is an example of a blog i have not yet updated since installing the new theme: http://charliedavies.co/2015/10/from-red-routes-to-user-stories/ There are 23 of these.

Finally I have a separate personal blog that i want to merge into my professional site. I have 64 blogs on this site www.justanotherlondoner.com - These need adding to www.charliedavies.co under the post category 'London Life'. With all content, tags and images transferring over. These should be in the same page setting as the latests blogs added: http://charliedavies.co/2016/03/how-to-sound-smart-in-your-tedx-talk/ with the blue image and black text at the top.

i can provide login details to both site and ftp access if needed.
Extra services needed: Customization
Extra notes:
I need this completing ASAP ideally by tuesday/wednesday next week at the latest.