[Question] Can't flash, can't get into bootloader...

[mirandam]

at the risk of offending mirandam
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No offense at all, we all try to help the best way we can.

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Also, when I'm in ADB console, when I type any command besides adb sideload or adb devices, I get error saying: "error: closed". I cant get into fastboot with adb console.

this does not look right at all.

If you have a PC and adb is running correctly, for Windows users that means in admin mode.....you can not issue any adb command until you see a positive result for

Code:

adb devices

if you phone appears then and only then can you run

Code:

adb reboot bootloader

this will reboot phone into either a menu bootloader or fastboot
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True, but if the phone isn't booting at all it probably won't respond to adb. Some phone don't respond to adb in recovery.

Also, When I go to "wipe data/factory reset" in recovery, it says: "Mount /data error.".

Which to me seems like something is wrong with one of img files.
Could be your scatter file or even images itself.
If an image is too large to fit in the partition on your phone, it will overwrite part of the next partation usually leading to not booting.
As you can get into recovery, seems like preloader, lk.bin and recovery are ok, so it's likely to be one of the other images.
Bit tedious, but you'd do wise to check all images sizes against the info in the scatter file to make sure they fit.
And I stick with WuddaWaste's remark about flashtools, I think you should spend time and effort on getting this to work, otherwise things get too complicated.