Lost my keys to my 95 Lexus ls400 is did this year. Ok with a chopped key bow can I start it with out a key

Question edited for clarity, full 'year MAKE model'.
Question moved to Year Model category.

You can't! You have to fix the problem not find a way around it.

You have a Lexus not an 1981 Chrysler. I have an ES330. Your antitheft system is protecting your vehicle to stop precisely what you are trying to do, drive the car without the correct credentials. You have a transponder chip in the key, a receiver in the steering column, alarm sensors, the antitheft module, the Body Control Module, the Engine Control Module, and all the break-in sensors on hood, trunk, doors, and inside the vehicle all protecting you against theft.

You need an auto electrician, the dealership, or an auto locksmith / alarm installer with a pro grade scan tool computer to check the system and find out why it isn't working. If you lost all three keys, the dealership can make a key based on the VIN Number. Get one and then get the auto locksmith to make another and program both.

https://www.google.com/search?q=auto+electrician+near+me

I do not understand what you are asking. what are you saying it will turn over but won't crank? Are you sure the battery is OK, The alternator charges the battery and powers the electrical system but is out of the system when trying to start it.

Did u check the timing belt. Does it crank over faster than normal?

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eplaced engine on '97 SC300 now new engine does not have Crank ...

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car the dealer get a new key

If the solenoid is clicking when you turn the key its very unlikely to be a relay fault, the relay controls the feed to the exciter wire which must be working for the solenoid to be clicking. If you haven't ruled out the battery completely do so by attaching jump leads, if that makes no difference you ideally need to check for a volt drop between engine and battery earth terminal and also main starter feed to battery positive, (the latter can be a problem with difficult to access starter motors tho.) if all wiring is ok its most likely the motor itself, if you can get to it give it a tap with something and see if it makes any difference. If it starts after a tap then its most likely the starter motor.

this could be a starter or the enigtion swicth yes if you crank the key to long it will kill the battery.

sounds like an engine immobilizer problem. close all doors,hood & trunk completely. lock and unlock the car three times with remote, then put key in door lock and lock & unlock three times.
did you accidently try to start with wrong key?

If oyu have spark, fuel and compression the engine should start.

bad ground or blown fuse