Good work staying alive
SittnDown!
Pleased with Toku and open borders, very very nice.
Toku has Alphabet?
He only trades techs that 100% of the AI knows, so that means
every single AI has Pottery, Writing, and Iron Working.
You also get a teching bonus for a tech if AI's know it and you've met them.
If all the AI in the world know it, and you've met all of them, then you get a 30% teching bonus.
If 1 out of 6 know it, then a 5% teching bonus.
If 2 out of 6 know it, then a 10% teching bonus.
Deity AI always start with Hunting and Archery and all starting techs, so meeting them is a great way to boost research.
Prerequisite techs also give a +20% teching bonus for each prereq tech.
Agriculture has none, so no bonus.

Pottery has both Fishing and Agriculture leading to it, so if you know
both techs before researching Pottery, then you get two 20% bonuses.
The max for Pottery is having both Agriculture and Fishing already researched, and knowing all the world who all have Pottery.
This gives +20%, +20%, and +30% bonus to teching, or +70%.
If you tech Pottery with +20

and press next turn, then hover over the bar at the top of the screen, it will say 20*1.70 = +34

completed.
==========
Gnnn, you probably want more better advice.
Ok, since you are Pleased with Toku and he is willing to trade techs, it is
time to consider begging.
Begging civs that are Pleased or Friendly with you gives no diplo penalties.
https://forums.civfanatics.com/threads/land-target-and-manipulating-the-ai.561148/
I won't make you do the math since your
eyes will glaze over, but you touch 10 of Toku's land tiles with your land tiles so you are a Land Target in his eyes.
That means you can beg triple the amount of normal!!!
Let's see, know Toku around 33 turns, Power Ratio isn't visible since not enough

on Tokugawa, but I'm
guessing around 0.3?
The formula for the
amount you can beg is GOLD*2=TECH*1.5=
Begging_Ceiling = [
floor(((Turns_Known + 50) * 2 * (Our_Power + 100))/(Their_Power + 100)
) * 3 if Land Target]
You want to beg a technology, so TECH*1.5=[floor(((33+50)*2*(??? thousand Soldier from Demo screen + 100))/(??? thousand Soldiers Toku has +100))*3 yes to land target
Gonna have to guess here.
SittnDown has so few troops, the +100 in the power calculation will help him a lot more than Tokugawa.
TECH*1.5 = 88*2*(0.3???)*3 = 158
TECH = 158/1.5 = 105
So, with your weak (probably) Power Ratio with Toku, I would estimate that you can beg up to 105

from Tokugawa.
I can't give you an exact number unless you know precisely what turn you met Toku, and have enough

on Toku to get a Power Ratio to go with your Demo screen troops.
Basically,
tech Writing until you have 100
left to finish it, then beg Tokugawa for Writing and he should give it to you if you haven't already begged him.
Each beg has a 5% chance of being forgotten each turn, and you can't beg again successfully until they have forgotten the previous beg.
So it should be safe to beg around every 25 turns.
I would be shocked if Toku refused you, but you can't be that much weaker than him, especially with the +100 helping you out.
Be sure to sign Open Borders with everyone.
==========
More mundane advice, you need more than 2 Workers.
Riverside Farms that 2 cities can share are the best.
Being Philo, river farms are more valuable than cottages, especially in this heavy whipping scenario.
Library in capital is best since the Palace gives +8

You probably won't steal the pigs since that Toku city also has borders popped twice.
You would need Library in capital, a city 1S of Pigs, and then a Library in that city also to steal the pigs.
A better choice for a 4rd city might be on the jungle hill south of the Corn.
It can borrow the Corn to grow and also get some farms.
That really slows down the Math bulb though since you don't have Granaries yet, hmm
Boston can farm the Floodplains and 2 river tiles to get up to +6
I'd recommend Workers in Boston and New York, and 3 pop-whipping Libarary in capital after the Toku beg, then working 2 Scientists at Size 4.
Hannibal already has Math, so a Math bulb later than 12 turns from now might not be able to be traded for anything. 
Ideal scenario is to bribe Genghis and Toku to war against Jewish Egypt with Math, then maybe trade Math for one or two techs with the rest.
Getting Alphabet is tough because Deity AI only give around 78% of the tech value in trades.