Hi Anya, no they're not the same. The word "too" and "bit" make the difference. These two words show the measure of coldness.

"A bit cold" describes a teperature less than expected ."a bit too cold" means less than id desired or less than i s comfortable.

No there are not the same. A bit cold is correct and a bit too cold is wrong.

Very cold

A good question! Like others have said, 'too' means undesirable. It's too cold to go outside. I would go outside if it wasn't so cold. It's a bit cold outside. You.have to understand that 'bit' in British English can mean anything from 'not much' to 'a lot', it depends how you say it: Not very cold.