There are dozens of universal remotes, each with its own type of code. You need to give us the brand and model of the univeral remote you have! Go to the manufacturers website, they nearly all have manuals/codes to download. try remotescentral.com files library for even more manuals.
Re: the TV, these low end supermarket sets are almost all made by the likes of Vestel. See if you can find those codes. try also codes for philips and Thomson, SEG, techwood, bluesky, first line, Akura, Alba, Bush, matsui, targa, schöntech.