Help me figure out my boat (livewell)

[YeA 20sF]

So my 78' SF has a rear live well (i think) but when I bought my boat it came with a cooler type external live well. Dont really like it since it takes up deck space which is already limited. I tried using this livewell setup once but i think I burnt out the pump because it dosent want to work anymore. I honestly would like to get the original one working as well as add in a wash down. Whats confusing me is the proper plumbing that should be done to get what I want to work. I am pretty new to all this so bare with me. I know I would need a special wash down pump to get the whole washdown idea work.... right ?

Here are some pics of what I got going on right now. Sorry if the pics are a bit rough to see I dont have a real digi cam to take nice pics like most of u ......

Original livewell


And whats inside...



Livewell pump (I think?) which I think is burnt out?


this is where it pumps water to via the clear tube





Other random pics of the bilge set up.... I think the float switch is broken also because the bilge pump only works when I hit the switch and not on auto....





I really wanna get the livewell working and tidy up that mess in my bilge are so I am looking for suggestions for you pros on what to do because I am pretty lost lol