What does the big red exclamation point on my 07 bmw 328i display mean?

When you disconnect the battery, it causes the anti-theft system pairing to break. On reconnecting the battery, the key and transponder chip need re-pairing. There are some ideas in the link, but with a BMW your best bet is to call a mobile auto-electrician or an auto locksmith. They both have pro grade scan tool computers that can reset the anti-theft system and diagnose any other electrical issues.

https://www.google.com/search?q=2011+bmw+328i+reset+anti-theft+system

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That's not the way it works. You go to a place like this and just order one

https://shop.advanceautoparts.com/find/bmw-328i-starter-relay

If you mean the location in the box?

https://www.google.com/search?q=bmw+328i+2009+relay+diagram

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I do not know of an "Air Pump" for a 1996 328i. Did you mean
fuel pump (15A fuse # 18) or
blower motor (30A fuse # 20)

where the orange warning is ?

Look in your owners manual

Can also find those symbols on the internet

It means "something is wrong". You need to check the messages to find out.

If the exclamation mark is in the middle of a rough circle, then it means the transmission is in safe mode due to malfunction. Put the car in park and engage the parking break. Turn off the engine and wait. After 30 seconds, restart the car. If the light is no longer on, the transmission is back in normal performance. Take it to a mechanic to have things checked out. If the light remains on, the car will only operate in certain gears and driving performance will be limited. The car requires immediate attention from a BMW mechanic and should not be driven any more than necessary to get to the mechanic.might be speed sensor or transmission control module.

I have a ((PARK)) bolded in red come up on my dash everytime I excelerate...does anyone know what this means???

I have a yellow triangle with a ? on my dash what does this mean

Need to replace your brake pads.