Questions about already hacker Wii

Hello guys, how's it going?

I recently got a second hand Wii which is already modded. It has the Homebrew channel and the USB Loader GX.
There are some things that I want to do, but I will need some clarification:

1. How do I find out if my Wii already has PriiLoader installed?
2. Does my Wii has modified IOSs?
3. Can I format my Wii to make it look like brand new and do the hacking process again?

To give you guys some info, here's my sysCheck

Spoiler

SysCheck HDE v2.4.0 HacksDen Edition by JoostinOnline, Double_A, R2-D2199, and Nano
...runs on IOS58 (rev 6176).

Region: NTSC-U
System Menu 4.3U (v513)

Drive date: 12.18.2008
Homebrew Channel 1.1.2 running on IOS58

Hollywood v0x21
Console ID:
Console Type: Wii
Shop Channel Country: Brazil (16)
Boot2 v4
Found 90 titles.
Found 49 IOS on this console. 10 of them are stubs.

IOS3 (rev 65280): Stub
IOS4 (rev 65280): Stub
IOS9 (rev 1034): No Patches
IOS10 (rev 768): Stub
IOS11 (rev 256): Stub
IOS12 (rev 526): No Patches
IOS13 (rev 1032): No Patches
IOS14 (rev 1032): No Patches
IOS15 (rev 1032): No Patches
IOS16 (rev 512): Stub
IOS17 (rev 1032): No Patches
IOS20 (rev 256): Stub
IOS21 (rev 1039): No Patches
IOS22 (rev 1294): No Patches
IOS28 (rev 1807): No Patches
IOS30 (rev 2816): Stub
IOS31 (rev 3608): No Patches
IOS33 (rev 3608): No Patches
IOS34 (rev 3608): No Patches
IOS35 (rev 3608): No Patches
IOS36 (rev 3608): Trucha Bug, ES Identify, NAND Access
IOS37 (rev 5663): No Patches
IOS38 (rev 4124): No Patches
IOS40 (rev 3072): Stub
IOS41 (rev 3607): No Patches
IOS43 (rev 3607): No Patches
IOS45 (rev 3607): No Patches
IOS46 (rev 3607): No Patches
IOS48 (rev 4124): No Patches
IOS50 (rev 5120, Info: rev 4889): No Patches
IOS51 (rev 4864): Stub
IOS52 (rev 5888): Stub
IOS53 (rev 5663): No Patches
IOS55 (rev 5663): No Patches
IOS56 (rev 5662): No Patches
IOS57 (rev 5919): No Patches
IOS58 (rev 6176): USB 2.0
IOS60 (rev 6400, Info: rev 6174): No Patches
IOS61 (rev 5662): No Patches
IOS62 (rev 6430): No Patches
IOS70 (rev 6912, Info: rev 6687): No Patches
IOS80 (rev 6944): Trucha Bug
IOS202[60] (rev 65535, Info: Hermes-v55.1): Trucha Bug, NAND Access, USB 2.0
IOS222[38] (rev 65535, Info: Hermes-v55.1): Trucha Bug, ES Identify, NAND Access, USB 2.0
IOS223[37] (rev 65535, Info: Hermes-v55.1): Trucha Bug, NAND Access, USB 2.0
IOS224[57] (rev 65535, Info: Hermes-v55.1): Trucha Bug, NAND Access, USB 2.0
IOS249[56] (rev 21007, Info: d2x-v7): Trucha Bug, NAND Access, USB 2.0
IOS250[57] (rev 65535, Info: d2x-v7): Trucha Bug, NAND Access, USB 2.0
IOS254 (rev 65281): BootMii
BC v6
MIOS v10
Report generated on 12/04/2020.

Also, when I turn my console on, there's an image that comes up which doesn't seem to be part of the default Wii boot, here's a photo:
imgur [dot] com / J1s5TK5

And lastly, this is how my Wii menu looks like:
imgur [dot] com / pjmjxXs

One more thing: I tried to launch the bootmii via HBC to backup my NAND, but it only gives me a black screen with blinking drive, also there's no bootmii folder in the SD card. So that means bootmii is not installed and now I need PriiLoader?

 

Cool! Thanks for the answers guys!
The thing is, I'm really thinking about formatting it and doing the hacking process myself, so that I can learn how it is done. Would it be safe to do that? By doing it, would I lose the custom IOSs? If I do that, is there anything important that I should pay attention to?

Also, I've already backed up the NAND, just in case.

 

Why wouldn't the factory reset be helpful?

 

I see! I think I'll just do a cleanup on the SD card and the channels to spare myself of the hassle of cleaning everything up. But, if now I decide to clean everything up, now I know how, thanks to you guys!