The ABS and traction control light would indicate that one of your ABS sensors is at fault, so I would get it hooked up on diagnostics to find out which one is not working.

As for the Airbag light, it there is no real way to stop it doing this, unless you remove the seatbelt pretensioners and connect them back up, but leave them unused under the seat. Other way to do it is to find out what resistance they are, and fit a resistors to counteract this.

As for the temp gauge, I'm not really sure and cant advise you on that.

Best of luck anyway.