Which tool can add smart key to Toyota when all keys lost?

The suggestion is that Xtool X100 Pad3 (X100 PAD Elite), Autel IM608 and Autel IM508 are good choices.

Method 1: XTOOL X100 PAD3 + KC100 adapter+ XTOOL KS-1 Toyota smart card
Method 2: Autel IM508+ APB112 key simulator
Method 3: Autel IM608+ XP400+ Autel APB112 Smart Key Simulator

In detail…
Method 1: XTOOL X100 PAD3 + KC100 adapter+ XTOOL KS-1 Toyota smart card

Two steps to add smart key (AKL):
Step 1: Backup IMMO data
Connect X100 PAD3 device with vehicle
Select Diagnosis-> Immobilization-> Toyota->All smart key lost-> Read immobilizer data

Follow the prompt to press the start button once
Read IMMO data and save it

Step 2: Generate emulator key
Enter Generate emulator key menu
Make sure connect the network to the device
Select the backup immobilizer file
Note: if there is no backup, please operate the “Backup immobilizer data” first
Select the corresponding file and identify key type
Connect the KC100 adapter with X100 PAD3 tablet
Activate KC100 automatically
Input KS-01 emulator smart card into KC100

Generate emulator successfully

Then you can follow the instructions to add new key
Method 2: Autel IM508+ XP200+ APB112 key simulator

Method 3: Autel IM608+ XP400+ APB112 key simulator

The guide to add Toyota smart key by IM508 is same as IM608.

Step 1: Back up Immobilizer data
Connect Autel IM508/IM608 key programmer with APB122 and vehicle

Select IMMO-> Toyota-> Manual Selection-> the corresponding car model-> Smart key-> Keyless system (CAN)-> Back up Immobilizer data

Pay attention to the prompt and then read IMMO data and save

Step 2: Generate simulator key
Select the EEPROM data and follow the instruction to generate key

Step 3: Add smart key
Put the simulator key APB112 close to the START button

Then put the smart key to learned close to the START button

Finally, learn the new key successfully

XTOOL X100 PAD3 Highlight:
1.Support key mismatch after loss
2.For Toyota/Lexus key lost
3.For VW 4/5th anti theft
4.Key increase matched
5.Support Multi-Language: English, Spanish, French, Russian, German, Polish, Portuguese, Turkish, Arabic
6.Update Via WIFI (always equip your device with the latest software)
7.Support 16 Special Functions
Service/Maintenance Light
Steering Angle Sensor Adjustment
Window Initialization
Throttle Relearn
PDF
BMS Reset
Seat Match
Electric Parking Brake
Cylinder
Airbag Repair
Air Suspension
Injector Coding
EEPROM Adapter
Headlight
Tire Pressure Reset
Gearbox Match

XTOOL X100 PAD3 TOYOTA all keys lost car list:
1.X100 PAD3 with XTOOL KS-1 simulator support Toyota 94 / D4, 98, 39, 88 / A8, A9 type smart key all-key-lost matching. Also support generation, copy and simulation of key chip.

2.The simulation card can be reused. After matching the key, turn off the power or remove the battery to restore the initial state.

3.XTOOL KS-1 TOYOTA SMART KEY SIMULATOR The key type has been tested:

No.    vehicle    Year    Key type    Support or not     Remarks
1    RAV4    2015    88    Yes
2    Alphard    2013    94    Yes
3    Alphard    2015    A9    Yes
4    Previa    2008    94    Yes
5    Crown    2010    98    Yes
6    Crown    2015    A8    Yes
7    Crown    2016    A8    No    After 2016, Toyota crown is not supported
TANGO, K518 even rival products are not
supported
8    Prado    2011    98    Yes
9    Previa    2013    94    Yes
10    Reiz    2011    98    Yes
11    Innova        39    Yes    The car is being tested for the Indian Tango

Autel IM608/IM508 Highlight:
1.Diagnosis Language: Default Language is English, Free to change French, German, Dutch, Polish, Swedish, Korean, Japanese, Russian, Italian, Traditional Chinese(Provide your device S/N to change language)
IMMO Language: English
2.Free Update Online for 1 Year
3.Warranty for 12 Months.
4.ADVANCED IMMO & KEY PROGRAMMING
5.OE-Level Diagnostic and Service Functions
6.Professional key programming equipped with XP400 key programmer and MaxiFlash ECU programmer for complete Immo coverage.
7.Ship from UK with Fast Delivery. No Import Duty Problem
8.NO IP Blocking Problem, Can Be Used in All EU Countries