Tweaks to Existing WP Template

Typical story....had an Indian developer convert my old site to a WP template...said he could do everything on budget then goal posts changed. Things I want doing that weren't done or done to my satisfaction by him include: 1) Contact page is unreliable and I'm continuing to miss sales enquiries despite my own email tests working 2) Existing slider on home page is largely useless so want to replace with another dynamic one that is SEO optimised and linkable to blog posts, specific product categories or media-based content (e.g. latest video) 3) WooCommerce has been set up but none of the pages are scoring highly for SEO and the look and feel is basic and it could be configured better so that customers can add relevant complementary products simply before checkout (drop down boxes?). The payment process takes too many clicks and think adding all your account info puts people off? 4) Checkout page needs some Adwords tacking code to it, google goals to be set and links to blog articles are distracting so need to be removed. 5) In terms of SEO the H1 and H2 tags require some attention as do the tab bar menu names. I'm looking to get found locally and nationally for the products we offer. 6) I'd like to be able to run a weekly or monthly offer that is easy to tweak with a simple image/text change 7) I have an Adwords account set up but results have been largely mixed. The text ads didn't do much but the image based ads seemed better albeit expensive. I have no idea how the image ads were set up but I'm keen to design some new ones and have them ready to go it Adwords is the best option. 8) Been told about a plug in that allows me to upload products automatically to eBay, Amazon etc (may already be installed) but needs configuring properly. I have to get products on white background for Amazon so maybe this is way to go for site in general? Open to suggestions. 9) In terms of general site look and feel, I've been working with a graphic designer who'd come up with a general theme so I'd like to see how this can be incorporated into site either as a background or possibly keeping everything as is and just 'theming up' slider images so it's instantly recognisable as Loco. 10) I've been told about a clever algorithm that tracks people who've visited my site and puts our adverts in front of them wherever they visit next so keen to explore the cost implications of this versus Adwords and other possible traffic generators. 11) I have another Joomla-based site that has some old links on it for various products I no longer sell so I'd like to update these with links to my brand's site but due to design or other site I'll need some images sized correctly and putting in the right place. 12) General update of WP and associated plug ins, delete any pages that aren't been used and any dead links on new site. Make maintenance as easy as possible so I'm not having to pay someone to update the site all the time.