Cake day galore [Solutions posted]

I stocked up on keys over the past months with the intent of doing a sizeable puzzle, but I never got around to designing the huge puzzle I wanted to do, and ConanOLion reminded me that it's my cake day... so instead, you get a handful of lazy puzzles and some trains (everything lvl 3)

Anyway, word of the day is cake, I hope you have some.

Please Stand By
Picross time
You know what it wants
Think like a computer
Enter the password

Have a day!

Notes:

• 38 giveaways in total
• All 6 trains have hidden giveaways
• Puzzle 4 is case ignorant, so maybe half of what you think is necessary, is unnecessary.
• Ends on Valentine's Day.

[SOLUTIONS]

1. Solve the jigidi, each cart in the train has a hidden character which leads to a hidden giveaway
2. Solve the nonagram, each cart in the train has a hidden character which leads to a hidden giveaway. Nonagram site hides trailing characters on SG links, so you had to notice the R in the previous link on the cart and the next cart's link back to the first cart.
3. Konami code. each cart in the train has a hidden character which leads to a hidden giveaway
4. CAKE/cake in binary is 3, 1, 11, 5 that is 0011, 0001, 1011, 0101. First 4 binary characters (nibble) in each byte declares the case of the character if you're using a converter. Each cart in the train has a hidden character which leads to a hidden giveaway
5. the word is cake. Each cart in the train has a hidden character which leads to a hidden giveaway
6. Each hidden giveaway in the first 5 trains has an italicized character in the description, those 5 characters lead to train 6. If you lost track of which hidden giveaway went to which track, the hidden giveaways did have different time stamps so you knew which order to put the characters in, but they were already in order, so most didn't have trouble I think. Much like the nonagram train, I couldn't give you the first character up front, so you had to look at the previous link in the next cart to get the first character. each character in the 7 cart train combined makes a code for a link to a SG comment, it's a less frequently used puzzle tactic, but it's one I've used before.
7. You made it to the end!