I don't think Tesla will get as big as Toyota. Toyota is the second highest selling car company, and they're a close second to Volkswagen. Volkswagen Group will be the biggest electric car company in a few years because they're spending the most money on it:
https://europe.autonews.com/automakers/vws-91b-spend-evs-out...
Volkswagen's current and soon to be released battery electrics are the VW e-Up!, VW e-Golf (though this is being discontinued), VW ID.3, SEAT Mii Electric, SEAT el-Born, Skoda Citigo iV, Skoda Vision iV, Audi e-tron, and the Porsche Taycan.
Future Volkswagen battery electrics are the VW ID Crozz, VW ID Roomz, VW ID Buzz, Porsche Taycan Cross Turismo, Porsche Macan electric, Audi e-tron GT, and the Audi e-tron Q4. Volkwagen's roadmap is bigger and broader than Tesla's can be simply because Volkswagen operates at a larger scale.