And what is your evidence for such a claim?
The actual evidence and history doesn't support this. Toyota produced its first production all electric vehicle, the Rav4, and its first production hybrid, the Prius, all the way back in 1997. A decade before Tesla produced a single car or the release of "An Inconvenient Truth". Toyota has invested billions into crucial battery development and has been at the forefront of this research since the late 1980's.
Perhaps you are alluding to the fact that Toyota's leadership don't see EVs as the end-all-be-all of the future of automobiles. This isn't a sign they are anti-EV, it's a sign that they like to make money and aren't stupidly putting all their eggs in one basket the way Tesla has. Toyota has had more experience than any other auto manufacturer in alternatives such as hybrid-electric and hydrogen fuel-cell vehicles.
As far as greenwashing. Electricity production and hydrogen production share the same problem, the energy has to come from somewhere. With the exception of people who actually use their own solar themselves, electric vehicles are not truly zero emission. This is because, for the time being, the majority of the electricity produced in the US and around the world is still from fossil fuels. We are just starting to approach 25% in the US. If you are buying electricity, which most people will end up doing, you are still emitting Co2 and you're just trading the "Oil industry" for the "Electricity industry" And with companies like PG&E and Enron it's hard to claim that that industry is any less corruptible or has better business practices than the oil industry.
I'm also not sure that the world would really be better place if everyone had their own PV panels. While a one time initial cost, PVs are not without their own environmental impacts. The manufacturing process is not carbon neutral and requires the use of chemicals like hydrochloric and sulfuric acid and PVs also contain toxic chemicals like cadmium-telluride and gallium arsenide. Contrary to popular belief, panels also don't last forever, they have a useful life of about 25-30 years, after which they decline in output and need to be replaced, and hopefully recycled and not just thrown in a landfill.
More importantly, individual PV system are not an efficient use of resources or labor. Individual installation and maintenance of individual system is very inefficient and not cost effective at scale. Particularly because residential system are oft oversized, and must include storage, unless they are grid tied. Residential systems, even correctly scaled grid tied systems, cost about double the cost of utility scale systems on a per kWh basis. With residential systems coming in around 16 cents per kWh and utility-scale systems around 8 cents per kWh. This isn't particularly cost effective. Its also likely that this gap in cost will continue to widen as increasing labor and material choices caused by inflation will have a greater impact on small scale installations than those that are utility-scale where economies of scale can work to keep costs in check or even drive them down as more utilities install more and larger solar systems.
