You can use the ones provided by your suppliers. You can try contacting them directly if they can provide you with a data feed of their products so you can easily upload them on to your site.
Otherwise you might want to get images from Link hidden: Login to view
and/or Link hidden: Login to view
. You can also use images from Link hidden: Login to view
As for the product descriptions in the data feed provided by your supplier, you may want to edit them a bit to give it a personal touch so they stand out from those of other online sellers using the same data feed as you are.
Hope this helps! Welcome to SaleHoo :)