Alarm system engaged car will not start

Hey thank you for replying I did look over the repair guide I didn't find anything that was specific about my make and model I don't have a key fob or a key with a chip my friend I bought the car from has passed away and her husband said she had it happen to her but he don't remember what she did to fix it I no there was a remote starter on the vehicle that was removed before I purchased the car there is some kind of connection wire going to the positive cable with a 30 amp fuse a big like bus fuse tried to remove it but with out that being connected there is no power at all getting to the car but it seems as if I could some how not have that connection I could possibly kill the alarm I have got the car started4 times since it happen n everytime I thought yes I got it I would drive some where n go n a store n come out n the alarm started going crazy n called n got it towed home I haven't gotten it started n 11 days at this point the battery is completely dead any other advice would greatly b appreciated